Today on New Scientist: 30 January 2013

Timbuktu's precious scientific texts must be saved

Islamist militants in Mali have burned documents that attest to science in Africa before European colonisation - what remains must be protected

Think that massage feels good? Try adding drugs

Nerve bundles that respond to stroking have been identified and chemically activated in mice

How Obama will deliver his climate promise

The US is set to meet - and maybe exceed - Obama's pledge to cut US emissions by 17 per cent, which could give a boost to international climate talks

Minimum booze price will rein in alcohol abuse

Evidence suggests the UK government's proposal to set a minimum price for alcohol could save thousands of lives, and billions of pounds of public money

First real time-travel movies are loopers

Hollywood has played with time travel for decades, but now physicists have the first movies of what travelling to the past actually looks like

Surfer rides highest wave ever caught

Garret McNamara of Hawaii claims to have ridden the highest wave ever caught by a surfer, a 30-metre monster off the coast of Nazaré, Portugal

Infrared laptop trackpad ignores accidental touches

Longpad is a touchpad that extends the full width of your laptop and uses infrared sensors to ignore any unwanted touches

Close call coming: Averting the asteroid threat

With an errant space rock heading this way, just how good are our asteroid defences - and how do we avert the cataclysm?

The right to fight: women at war

The US military has accepted women into combat. What can science tell us about how women deal with being in the line of fire? And are they any different to men?

Earth and others lose status as Goldilocks worlds

Several planets are taking a hit thanks to a redefinition of the habitable zone - the area around a star in which liquid water can theoretically exist

The 10,000-year bender: Why humans love a tipple

Our taste for alcohol results from an evolutionary tussle between humans and yeast - one in which the microbes have often had the upper hand

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Japan PM says to change post-war constitution

TOKYO: Japan's hawkish Prime Minister Shinzo Abe told parliament Thursday that he intends to change the country's post-World War II constitution, lowering the bar for further amendments.

"I will start with amending Article 96 of the constitution, a move that many factions (inside his Liberal Democratic Party) support," Abe told upper house lawmakers, referring to the clause stipulating amendments require a two-thirds majority in parliament.

In the run-up to his landslide election victory in December, Abe said he wanted to study the possibility of altering the definition of Japan's armed forces contained in the document.

The country's well-funded and well-equipped military is referred to as the Self-Defence Forces, and barred from taking aggressive action. Its role is limited to defence of the nation.

Abe has said he would like to look into making the SDF into a full-fledged military, a plan that sets alarm bells ringing in Asian countries subject to Japan's sometimes-brutal occupation in the first half of the 20th century.

US occupying forces imposed the constitution in the aftermath of World War II, but its war-renouncing Article Nine is held dear by many Japanese.

-AFP/fl

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Teen who performed at inaugural events shot dead

By Catherine E. Shoichet and Ted Rowlands, CNN

updated 9:33 PM EST, Wed January 30, 2013

STORY HIGHLIGHTS

• NEW: Chicago mayor: "We have a responsibility to see a stop to this"


• Hadiya Pendleton, 15, was shot dead in Chicago on Tuesday


• Last week she performed in events surrounding President Obama's inauguration


• "Just a matter of days after the happiest day of her life, she's gone," Sen. Dick Durbin says

Chicago (CNN) -- A teen who performed at events around President Barack Obama's inauguration was shot to death in Chicago this week, and now her story has become part of the debate in Washington over gun violence nationwide.

The shooting death of 15-year-old Hadiya Pendleton came up in a U.S. Senate hearing and a White House press briefing Wednesday.

"She was an honor student and a majorette," said Sen. Dick Durbin, D-Illinois. Performing at inaugural events last week "was the highlight of her young, 15-year-old life," he said.

Speaking at Wednesday's Senate Judiciary Committee hearing on gun violence, Durbin mentioned Pendleton's death as he argued that more must be done to stop gun crimes.

Giffords: 'Too many children dying'

"Yesterday, in a rainstorm after school, she raced to a shelter. A gunman came in and shot her dead," he said. "Just a matter of days after the happiest day of her life, she's gone."

The park shelter where she was shot is just a mile from Obama's home in Chicago.

White House spokesman Jay Carney described her death as a "terrible tragedy."

"The president has more than once, when he talks about gun violence in America, referred not just to the horror of Newtown or Aurora or Virginia Tech or Oak Creek but to shootings on the corner in Chicago or other parts of the country," Carney told reporters. "And this is just another example of the problem we need to deal with."

2013 has gotten off to a deadly start in Chicago -- Pendleton was the year's 42nd murder victim. No arrests have been made in the case, police said Wednesday.

In 2012, 506 people were slain in the city.

Chicago Mayor Rahm Emanuel described Pendleton Wednesday as "what's best in our city, a child going to school who takes a final exam, who had just been to the inaugural."

"We have a responsibility to see a stop to this," he said. "And all of us are responsible."

Pendleton was shot just blocks away from her high school on the south side of Chicago, CNN affiliate WGN reported.

LaPierre, the NRA's heavyweight

Police told CNN affiliates that the teenager had no gang affiliation and likely was not the intended target.

"There has to be an end to it. It's just too much. The children cannot go to school. They're in fear," Bonita O'Bannion, who lives in the area where the shooting occurred, told CNN affiliate WBBM.

Carney said the president and first lady's thoughts and prayers are with Pendleton's family.

"And as the president said, we will never be able to eradicate every act of evil in this country," Carney said, "but if we can save even one child's life, we have an obligation to try when it comes to the scourge of gun violence."

How the violent mentally ill can buy guns

CNN's Ted Rowlands reported from Chicago. CNN's Catherine E. Shoichet wrote the story in Atlanta. CNN's Tom Cohen contributed to this report from Washington.

Part of complete coverage on

updated 2:46 PM EST, Wed January 30, 2013

The federal background check system for gun buyers didn't stop a mentally ill man from buying a gun, which he used to kill his mother.

updated 9:15 PM EST, Wed January 30, 2013

Rather than focusing on gun restrictions, the NRA is promoting a focus on fixing the nation's mental health system.

updated 1:28 PM EST, Wed January 30, 2013

Wayne LaPierre is not a large man. Yet, in Washington, he can make even brave politicians toss in the towel at the first sign of a scuffle.

updated 12:17 PM EST, Tue January 29, 2013

More than 6,000 people are killed each year by handguns. That's like having a massacre on the scale of Newtown 239 times during one year.

updated 3:18 PM EST, Sat January 26, 2013

On one side were pegboard panels mounted with various assault rifles and semi-automatic weapons -- including a Bushmaster similar to the one used in last month's Newtown school massacre.

updated 2:48 PM EST, Mon January 28, 2013

The National Rifle Association chief issued a blistering retort to President Barack Obama's inaugural address, accusing him of name calling and limiting American freedoms.

updated 2:50 PM EST, Mon January 28, 2013

President Barack Obama proposed a package of measures intended to reduce gun violence in the wake of the Newtown school massacre last month. But would they work?

updated 3:41 PM EST, Sat January 26, 2013

Proponents of gun control hold a March in Washington, while small number opponents gather to express their views.

updated 7:11 AM EST, Wed January 16, 2013

A month after the deadly school shootings in Newtown, Connecticut, the National Rifle Association is taking heat for releasing a mobile video game that lets players learn how to shoot at targets.

updated 7:49 AM EST, Mon January 28, 2013

Gens. Michael Hayden (Ret.) and Stanley McChrystal (Ret.) weigh in on America's gun debate.

updated 3:00 PM EST, Mon January 28, 2013

The "universal background checks" now being pushed by some gun control supporters is code for closing loopholes on such checks at gun shows and other private sales.

updated 3:01 PM EST, Mon January 28, 2013

Two couples rooted in the American mainstream. Two spouses who were nearly killed by mentally ill gunmen.

updated 3:02 PM EST, Mon January 28, 2013

Mass shootings in 2012 reignited the debate over legislation to combat gun violence. Here's a look at laws already on the books in the United States dealing with firearms.

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Obama: "No doubt" Congress will pass immigration, gun bills

Play Video

Obama: "No doubt" gun, immigration bills will pass in coming months

There's more bipartisan support in Congress for comprehensive immigration reform than gun control legislation, President Obama said tonight during an interview with Univision, but qualified that even under his proposal, illegal immigrants shouldn't be harboring expectations that they'll be granted citizenship "manana."

"Even under our proposal, this is not a situation where overnight, suddenly people all find themselves as citizens," Mr. Obama told the Spanish-language television network. "They're going to have to go to the back of the line. We're going to have to clear out the existing line, backlogs we have in terms of illegal immigrants, because they did it the right way. We shouldn't punish them for breaking the law.

"...What we don't want to do is to create some vague prospect in the future that somehow comprehensive immigration reform that includes a pathway to citizenship will happen manana," he continued, chuckling softly at the somewhat awkward injection of the Spanish word for "tomorrow." "But we have to put that in place at the outset, and make sure people are clear that this pathway is real and not just a fantasy for the future."

Asked whether he was in a standoff with Sen. Marco Rubio, R-Fla., the son of Cuban immigrants who has said he will not support a bill that does not put border control ahead of a path to citizenship, Mr. Obama said no, but pointed out that the number of people crossing the border illegally has dropped "about 80 percent since 2000."

On Tuesday, the president delivered a speech in Las Vegas outlining his immigration plan and applauding a bipartisan group of eight senators that has offered up proposals as well. In an interview today with another Spanish language network, Telemundo, he specified that he's hoping immigration reform that includes a pathway to citizenship can be passed in the next six months, but "certainly this year."

Meanwhile, despite facing more resistance from the right on tightening gun laws, he said he has "no doubt" that Congress will be able to put through legislation on gun control, as well as immigration.

Play Video

Obama: Legalization for illegal immigrants won't happen "ma?ana"

"On the gun issue, you're starting to see gun owners, people who traditionally have opposed gun control, saying, 'You know what, when 20 of our children are shot by somebody who is disturbed, and when it is that easy to get these high-clip magazines that can fire off hundreds of shots in a few minutes, then it's time for us to do better job on background checks, to get control of these magazine clips, to really crack down on gun trafficking," Mr. Obama said in the Univision interview.

The Senate Judiciary Committee today held the first congressional hearing on gun violence since last month's massacre at a Newtown, Conn., elementary school, that left 20 children and six adults dead. Star witnesses included former Rep. Gabrielle Giffords, D-Ariz., who survived a shot to the head two years ago during an assassination attempt that left six people dead, and her husband on one side, and NRA CEO Wayne LaPierre on the other.

Both gun control and immigration "will end up generating some opposition," the president said. "There will be passions on both sides. But I'm generally encouraged that the Senate seems to be having a serious conversation about these issues."

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Former Police Captain Cleared of Ex-Wife's Murder

A former Ohio police captain has been cleared in the murder of his ex-wife and released from prison, where he had been for 15 years -- but prosecutors say they plan to appeal the ruling.

"I'm just a jumble of emotions and I just can't wait to hug all of my family," Douglas Prade told reporters outside the prison when he was released Tuesday afternoon, according to ABC News' Cleveland affiliate WEWS-TV.

He thanked "all of the people that supported me and communicated with me and told me to keep my spirits up."

Prade's ex-wife, Dr. Margo Prade, 41, was found shot to death in her minivan outside of her medical practice in November 1997.

Douglas Prade was an Akron, Ohio, police captain at the time.

At trial, he was convicted on murder and wiretapping charges and sentenced to life in prison.

Prade, now 66, maintained his innocence and, eventually, the Ohio Innocence Project took up his cause and petitioned for his release or a new trial based on new DNA testing.

One of the key factors in Prade's conviction was a bite mark found on Margo Prade's body. The prosecution brought in an expert that testified the bite mark came from Douglas Prade.

Phil Masturzo/Akron Beacon Journal/AP Photo

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The Ohio Innocence Project commissioned a new DNA test that was not available at the time of the trial. The test found that the DNA around the bite was not Douglas Prade's.

Summit County Court of Common Pleas Judge Judy Hunter ruled that Prade should be set free because the new DNA results were "clear and convincing" in Prade's favor, according to the Associated Press.

Prosecutor Sherri Walsh is strongly disputing the new DNA evidence.

"This is a gross misapplication of the law, and we will be appealing Prade's exoneration. The defendant had to present new evidence so convincing that no juror would have found him guilty, and he failed to do so," Walsh said in a statement. "The DNA evidence presented by the Ohio Innocence Project on behalf of Prade is contaminated and unreliable. It does not prove innocence."

Walsh said that all evidence points to Prade as the person who killed Margo Prade.

"He was a serial stalker," Walsh said. "He tapped her phones and recorded more than 400 of her personal calls. He had verbally abused and threatened her. And we know Margo was afraid of him."

Other evidence includes Prade's handwritten tally of the bills he owed subtracted from the life insurance money he'd get if his wife died, Walsh said. Two witnesses placed him at the murder scene.

"We have not seen any credible evidence that suggests innocence, and we are taking all available actions to keep a dangerous killer off the streets," Walsh said.

Margo Prade's family is also upset by the decision.

"I feel like my life is in danger and my family's life is in danger now," Margo Prade's nephew Tony Fowler told the AP. "[Dr. Prade and her mother] are probably turning over in their graves but God will have the final say."

Alison McCarty, the former prosecutor on the case, told WEWS she respected the court's decision, but emphasized that the case is not yet closed.

"[Margo Prade] was such a superstar and it was just such a tremendous loss, and her death still needs justice," McCarty said.

The state has 30 days to file a motion in the court of appeals requesting permission to appeal the decision for a new trial.

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Today on New Scientist: 29 January 2013

Creatures of the air caught in the mist

Photographer Todd Forsgren uses mist nets to briefly ensnare a variety of tropical South American birds before releasing them, unharmed

Drug reduces enlarged prostate with few side effects

Shrinking enlarged prostates by blocking a potent growth factor could avoid problems - such as erectile dysfunction - that accompany current treatments

Climate change blamed for Australia's extreme weather

Floods have hit the east coast of Australia before recent bush fires have been put out, giving people a taste of climate change's possible consequences

Midnight sun: How to get 24-hour solar power

Rust may be the scourge of electronics but it could help solar power run all night

The most beautiful explanations

The 2012 Edge questions asked for great thinkers' favourite explanations. This Explains Everything collects them all into a fascinating read

Netted Costa Rican birds pay small price for art

Only mildly traumatic, mist nets offer an easy and safe way to catch birds for artistic, and ecological, study

Iran launches monkey into space

The Iranian Space Agency claims to have launched a rhesus monkey into space on a sub-orbital flight, and returned it safely to Earth

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Asian markets rise as Dow nears record high

HONG KONG: Asian markets climbed on Wednesday, with continuing weakness in the yen further fuelling a rally in Japan's Nikkei, while the Dow also provided some lift after ending at a near record high.

Traders are keeping an eye on the United States, where the Federal Reserve is due to end a two-day policy meeting, with analysts expecting it to carry on with its loose monetary policy.

Tokyo climbed 1.20 per cent, Hong Kong added 0.48 per cent, Sydney gained 0.23 per cent, Shanghai added 0.20 per cent and Seoul was flat.

The euro and dollar extended their gains against the yen in response to the Bank of Japan's pledge of unlimited easing last week and its target of two per cent inflation.

Investors took on board a comment from Japan's Finance Minister Taro Aso, who defending the country's easing policies against criticism from abroad, said the yen's "excessive strength is in correction".

A senior dealer at a major bank in Tokyo said: "The comment is nothing new so it can't push up the pair like a rocket anymore, but it still has some power left."

The dollar was changing hands at 90.95 yen in early Asian trade Wednesday against 90.72 yen in New York Tuesday afternoon.

The euro was at 122.67 yen and $1.3487 against 122.42 yen and $1.3493 in US trade.

On Wall Street the Dow rose 0.52 per cent to finish just 1.5 per cent below its all-time closing high seen in October 2007, despite a lack of buying incentives and a weaker-than-expected consumer confidence reading.

The S&P 500 advanced 0.51 per cent and the Nasdaq was flat.

US dealers are awaiting the outcome of the Fed's policy meeting later in the day, looking for new clues to the state of the economy. That will be followed on Friday by data on job creation.

Oil prices were down, with New York's main contract, light sweet crude for delivery in March dropping 12 cents to $97.45 a barrel and Brent North Sea crude for March delivery shedding five cents to $114.31.

Gold was at $1,664.00 at 0230 GMT compared with $1,661.10 late Tuesday.

- AFP/ck

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Tearful Newtown dad: No new gun laws

By David Ariosto, CNN

updated 8:09 PM EST, Tue January 29, 2013

STORY HIGHLIGHTS

• Mark Mattioli, a parent of a Sandy Hook victim, says there are more than enough gun laws


• "The time is now" to strengthen gun laws, says Veronique Pozner, another parent


• Crowd interrupts the statement of a parent of a slain child


• Connecticut has some of the nation's strictest gun laws

(CNN) -- His voice wavering, Mark Mattioli wiped away tears as he recalled the day his 6-year-old son died when a man wielding an AR-15 semi-automatic rifle broke into Sandy Hook Elementary School and began shooting.

His son, James, was among the 20 children and seven adults killed by Adam Lanza on December 14 in Newtown, Connecticut -- an event so horrific that it has since spawned a federal task force and kick-started a national conversation about gun control.

But unlike the handful of other parents who testified Monday at the emotionally charged hearing in Hartford, Connecticut, Mattioli said there are more than enough gun laws on the books. He called instead for a closer look at mental health policies.

Why new laws could miss America's bigger gun problem

"I don't care if you named it 'James' law,' I don't want (another law)," he said during the first of a series of meetings set up by a legislative task force assigned to review the state's gun laws.

Reaction to Newtown school killings

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"I think there's much more promise for a solution in identifying, researching and creating solutions along the lines of mental health."

Connecticut's medical examiner said he was told that Lanza, 20, had Asperger's syndrome. Research has not shown a link between that condition and violence.

The hearing drew hundreds to the Connecticut state house and revealed the sharp divide in public opinion over what should happen next in the massacre's aftermath.

"The time is now," said Veronique Pozner, whose son, Noah, was also killed, referring to a strengthening of the nation's gun laws.

Sandy Hook probe to extend until summer

With a framed photo of her slain 6-year-old propped up beside her, Pozner called on Connecticut to become "an agent for change" across the country.

During her testimony, she held up a crayon drawing that Noah once scrawled on Thanksgiving.

"I am thankful for the life I live," he wrote.

At one point during the hearing, Neil Heslin, father of a 6-year-old boy named Jesse who was also gunned down that day, asked why the public needed assault weapons and high-capacity magazines.

Some people in the crowd then interrupted his statement and shouted the "Second Amendment shall not be infringed."

"We're not living in the Wild West. We're not a Third World nation," Heslin continued. "We have the strongest military in the world. We don't need to defend our homes with weapons like that."

Connecticut already has some of the nation's strictest gun laws.

Gov. Dannel Malloy, a first-term Democrat, has also vowed to address the factors that led to last month's massacre and set up a 16-member panel of experts to come up with recommendations. It includes experts who reviewed policies after mass shootings in Colorado and at Virginia Tech.

The panel must meet a March 15 deadline for its initial report, which Malloy is expected to use in drafting initiatives aimed at reducing gun violence.

Newtown parents learn comforting details about son's death

Part of complete coverage on

Details continue to emerge about what precisely happened at Sandy Hook Elementary School. Here is a timeline of events that compiles the latest reporting.

An interactive tribute to the victims of the Sandy Hook Elementary School shooting.

updated 11:26 AM EST, Tue January 15, 2013

His parents remember Dylan Hockley as such a happy child.

updated 10:08 PM EST, Mon January 14, 2013

Many questions remain after a school massacre shocked the nation. But what's clear is that the pain remains powerfully visible throughout the community.

updated 12:17 PM EST, Fri December 21, 2012

Growing up in Louisiana and Texas in the home of a part-time deputy sheriff, guns were a constant presence in Robin's childhood.

updated 10:17 AM EST, Wed December 19, 2012

Amid the chaos that first-responder Ray Corbo witnessed on Friday, there is one image that he will never forget.

updated 10:02 AM EST, Thu December 20, 2012

In many ways, Josh Stepakoff's childhood came to an abrupt halt at 10:49 a.m. on August 10, 1999.

updated 9:40 AM EST, Thu December 20, 2012

When Lauren Rousseau's boyfriend wakes up, he can smell her perfume.

updated 10:30 AM EST, Tue December 18, 2012

Placing yourself in the path of flying bullets to protect innocents. It's a job description fitting for a soldier or police officer, but not for a school teacher.

updated 5:45 AM EST, Mon December 17, 2012

Robbie Parker has a message for the family of the gunman who killed his 6-year-old daughter and 19 of her school mates.

updated 11:46 AM EST, Fri December 21, 2012

Learn how to help the victims and families affected by the Connecticut school shooting tragedy.

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Grandson of oil tycoon T. Boone Pickens dies in Texas

Updated 8:35 PM ET

FORT WORTH, Texas A 21-year-old grandson of Texas oil tycoon T. Boone Pickens died Tuesday after being rushed to a hospital in Fort Worth, according to police and a family spokesman.

Play Video

Can Wind Aid Energy Crisis?

Thomas Boone Pickens IV, who went by Ty, was a junior at Texas Christian University. Pickens' spokesman, Jay Rosser, called the death an "unspeakable family tragedy" and asked that the family be allowed to grieve in private.

As reported by CBS Station KTVT Dallas, the family issued a statement: "Ty's loss at such a young age is an unspeakable family tragedy for the entire Pickens family and his many friends. We mourn his passing and respectfully request that the family be allowed to grieve in private in this time of sorrow."

Neither Rosser nor Fort Worth police have said what may have caused the death.

10 Photos

Thomas Boone "Ty" Pickens IV

Officers were dispatched after getting a report of a dead person at an off-campus location around 9:30 a.m. Tuesday, police spokeswoman Cpl. Tracey Knight said. Police said Ty Pickens was transported to a hospital, where he was pronounced dead.

Knight said the Tarrant County medical examiner would determine the cause of death. She declined further comment.

T. Boone Pickens appears on "CBS This Morning," Aug. 23, 2012.

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CBS News

The elder Pickens made much of his fortune in oil drilling but has since become an advocate for alternative energy. The 84-year-old also is active in politics and has donated millions of dollars to his alma mater, Oklahoma State University, and various other causes.

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Jodi Arias Borrowed Gas Cans Before Killing Ex

Accused murderer Jodi Arias borrowed two five-gallon gas cans from a former boyfriend the day before she drove to Arizona to kill another ex, Travis Alexander, according to testimony in Arias' murder trial today.

In cross examination, prosecutors also forced Arias' former live-in boyfriend Darryl Brewer to describe his sex life with Arias as "pretty aggressive."

Brewer, 52, dated Arias for four years and shared a home with her in California for two years. He told the court today that Arias called him in May 2008, asking to borrow gas cans, but would not explain why. She called him again at least two more times, and arrived at his house on June 2008, to borrow the cans.

On the day she picked up the gas cans she told Brewer that she was going to visit friends in California and Arizona.

Prosecutors argue that Arias then drove to Mesa, Ariz., where she allegedly had sex with Alexander, took nude photos of him, and then stabbed him 27 times, slashed his throat, and shot him twice in the head. She is charged with murder and could face the death penalty if convicted.

Arias, who claims she killed Alexander in self defense, had approached prosecutors two years ago offering to plea to a second degree murder charge, which could carry a 25 year term, but the state rejected the offer, Nancy Grace reported on Good Morning America today.

Brewer said that Arias never returned the gas cans. The pair had been broken up two years earlier and they had only spoken "sporadically," he said.

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Prosecutors also showed receipts from Arias' trip from her California home to Alexander's home in Mesa, showing that she purchased a 10 gallons of gas at one gas station the night before she drove to Arizona, and then another 10 gallons from a different gas station 10 minutes later. Prosecutors are expected to argue she brought the gas with her to fill up her car secretly on the way to Alexander's home, showing premeditation for the murder.

Arias' attorneys called Brewer as one of their first witnesses as they began mounting their case that Arias killed Alexander in self defense, arguing that Alexander was controlling and abusive toward Arias.

They asked Brewer to explain how he and Arias had been in a stable relationship for four years, from 2002 to 2006, and had bought a home together before Arias met Alexander at a business conference and began to change.

"I saw a lot of changes in Jodi. She became a different person than I had known previously," Brewer said, describing how Arias' behavior changed in May 2006 when she joined a company called Pre-Paid Legal. There, she met Alexander and began seeing him. She continued to live with Brewer.

"She had continued to pay the mortgage, but she was not paying other household bills, she began getting into debt or financial trouble," Brewer said. "For me it seemed she was not as rational or logical."

Arias also converted to Mormonism while living with Brewer, telling him that he could no longer curse and she would no longer have sex with him because she was saving herself for marriage.

The pair had previously had an "enthusiastic" and "aggressive" sex life, Brewer admitted to prosecutors. They had engaged in anal sex, Arias had taken nude photos of Brewer, and Arias had purchased breast implants in 2006, he testified.

Brewer said that after Arias began to change, he made arrangements to move closer to his son from his first marriage, and he and Arias broke up.

They kept in touch with occasional phone calls until Arias asked to borrow the gas cans in June 2008, and then called him a week after borrowing the cans to say that her friend had been killed.

Martinez, reading notes from an interview Brewer gave to authorities during the investigation into Alexander's death, asked if Arias had ever mentioned needing an "alibi." Brewer said he did not recall any conversation about alibis.

"After this date of June 4, 2008," Martinez asked, "you received a call from Jodi Arias, and she was very agitated?"

"She was sad," Brewer said.

"Did she tell you that her friend had been killed and she did not have an alibi?"

"I don't remember that," Brewer said.

Arias was arrested a month after Alexander was found dead, in July 2008.

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