WATERTOWN, Massachusetts (AP) - Armed guards protected the hospital where the wounded surviving Boston Marathon bombing suspect was in serious condition Saturday and unable to be questioned to determine the motives behind the worst terrorist attack in the U.S. since Sept. 11, 2001.
U.S. officials said a special interrogation team for high-value suspects was waiting to question 19-year-old Dzhokhar Tsarnaev, whose older brother and alleged accomplice was killed Friday morning in a wild shootout in suburban Boston.
Authorities planned to invoke a rare public safety exception to enable the team to interrogate Tsarnaev without first advising him of his right to remain silent to avoid self-incrimination and be provided an attorney, a warning typically given to criminal suspects.
The FBI's website says the exception "permits law enforcement to engage in a limited and focused unwarned interrogation" of a suspect and introduce any statements gathered as evidence in a criminal prosecution. The FBI says "police officers confronting situations that create a danger to themselves or others may ask questions designed to neutralize the threat without first providing a warning of rights."
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The American Civil Liberties Union expressed concern that Tsarnaev will be questioned by investigators without being read his rights. ACLU Executive Director Anthony Romero said the exception applies only when there's a continued threat to public safety and is "not an open-ended exception" to the so-called Miranda rule mandating warnings about self-incrimination and the right to legal councel.
The capture of Dzhokhar Tsarnaev lifted days of anxiety for Boston and Americans everywhere, but little was known about the motivation of the ethnic Chechen brothers.
President Barack Obama vowed investigators would solve that mystery. "The families of those killed so senselessly deserve answers," said Obama, who branded the suspects "terrorists." Obama said the capture closed "an important chapter in this tragedy," but he said there are many unanswered questions about the Boston bombings, including whether the two men had help from others.
"When a tragedy like this happens, with public safety at risk and the stakes so high, it's important that we do this right," he said. "That's why we take care not to rush to judgment -- not about the motivations of these individuals, certainly not about entire groups of people."
Late Friday, less than an hour after authorities said the search for the 19-year-old college student had proved fruitless and lifted a daylong order that had kept Boston-area residents in their homes, a man emerged from his Watertown home and noticed blood on the pleasure boat parked in his backyard. He lifted the tarp and found the wounded Tsarnaev, known the world over as Suspect No. 2.
Soon after that, the 24-hour drama that had shut down a metropolitan area of millions while legions of police went house to house looking for the remaining suspected Boston Marathon bomber was over.
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Boston police announced via Twitter that Tsarnaev was in custody. They later wrote: "CAPTURED!!! The hunt is over. The search is done. The terror is over. And justice has won. Suspect in custody."
Dzhokhar Tsarnaev's capture touched off raucous celebrations in and around Boston, with chants of "USA, USA" as residents flooded the streets in relief and jubilation after four tense days since twin explosions ripped through the marathon's crowd at the finish line on Monday, killing three people and wounding more than 180.
As Boston returned to normal, the city's beloved baseball team, the Boston Red Sox faced the Kansas City Royals Saturday afternoon for their first home game since the marathon attacks. The Red Sox had postponed Friday night's game against the Royals.
Bomb-sniffing dogs and military in camouflage fatigues joined the police patrolling Fenway Park, when the Red Sox dressed in specially designed uniforms that said "Boston" instead of "Red Sox. The team said the uniforms would be autographed and auctioned off to raise money for the One Fund Boston, the charity established to help the victims.
Dzhokhar and his brother, 26-year-old Tamerlan Tsarnaev, were identified by authorities and relatives as ethnic Chechens from southern Russia who had been in the U.S. for about a decade and were believed to be living in Cambridge, just outside Boston. Tamerlan Tsarnaev died early in the day of gunshot wounds and a possible blast injury. He was run over by his younger brother in a car as he lay wounded, according to investigators.
During a long night of violence Thursday and into Friday, the brothers carjacked a man in a Mercedes-Benz in Cambridge, just across the Charles River from Boston, then released him unharmed at a gas station, authorities said.
They also shot to death a Massachusetts Institute of
Technology police officer, 26-year-old Sean Collier, while he was responding to a report of a disturbance, investigators said.
The search for the Mercedes led to a chase that ended in Watertown, where authorities said the suspects threw explosive devices from the car and exchanged gunfire with police. A transit police officer, 33-year-old Richard Donohue, was shot and critically wounded, authorities said. As his brother lay dying, Dzhokar Tsarnaev abandoned his car and fled away on foot , authorities said.
The brothers had built an arsenal of pipe bombs, grenades and improvised explosive devices and used some of the weapons in trying to make their getaway, said Rep. Dutch Ruppersberger, a member of the House Intelligence Committee.
Late Friday, acting on the tip from the boat owner, authorities tracked down the 19-year-old college student holed up in the boat, weakened by a gunshot wound after fleeing on foot from the overnight shootout with police that left 200 spent rounds behind.
The resident who spotted Dzhokhar Tsarnaev in his boat in his Watertown yard called police, who tried to persuade the suspect to get out of the boat, said Boston Police Commissioner Ed Davis.
"He was not communicative," Davis said.
Instead, he said, there was an exchange of gunfire -- the final volley of one of the biggest manhunts in American history.
The bloody endgame came four days after the bombing and just a day after the FBI released surveillance-camera images of two young men suspected of planting the pressure-cooker explosives at the marathon finish line.
Watertown residents who had been told Friday morning to stay inside behind locked doors poured out of their homes and lined the streets to cheer police vehicles as they rolled away from the scene.
Celebratory bells rang from a church tower. Teenagers waved American flags. Drivers honked. Every time an emergency vehicle went by, people cheered loudly.
"They finally caught the jerk," said nurse Cindy Boyle. "It was scary. It was tense."
Police said three other people were taken into custody for questioning at an off-campus housing complex at the University of the Massachusetts at Dartmouth where Dzhokar Tsarnaev may have lived.
"Tonight, our family applauds the entire law enforcement community for a job well done, and trust that our justice system will now do its job," said the family of 8-year-old Martin Richard, who died in the bombing. Also killed in the attack was Lu Lingzi, a 23-year-old Chinese student, and Krystle Campbell, a 29-year-old restaurant worker.
An uncle of the bombing suspects, Ruslan Tsarnaev, said he was relieved his younger nephew was captured alive so he could seek forgiveness from the bombing victims.
Tsarni said he grew concerned about Tamerlan Tsarnaev when his older nephew told him in a 2009 phone conversation that he had chosen "God's business" over work or school. Tsarni said he then contacted a family friend who told him Tsarnaev had been influenced by a recent convert to Islam. Tsarni said the two hadn't spoken since that call.
Queries cascaded in after authorities released the surveillance-camera photos -- the FBI website was overwhelmed with 300,000 hits per minute --but what role those played in the overnight clash was unclear. State police spokesman Dave Procopio said police realized they were dealing with the bombing suspects based on what the two men told a carjacking victim during their night of crime.
The search by thousands of law enforcement officers all but shut down the Boston area for much of the day. Officials halted all mass transit, including Amtrak passenger trains to New York, advised businesses not to open and warned close to 1 million people in the city and some of its suburbs to unlock their doors only for uniformed police.
Until the younger suspect's capture, it was looking like a grim day for police. As night fell, they announced that they were scaling back the hunt and lifting the stay-indoors order across the region because they had come up empty-handed.
But then the break came and within a couple of hours, the search was over. Dzhokhar Tsarnaev was captured about a mile (1.6 kilometers) from the site of the shootout that killed his brother.
Authorities said the man dubbed Suspect No. 1 -- the one in sunglasses and a dark baseball cap in the surveillance-camera pictures -- was Tamerlan Tsarnaev, while Suspect No. 2, the one in a white baseball cap worn backward, was his younger brother Dzhokar.
Chechnya has been the scene of two wars between Russian forces and separatists since 1994, in which tens of thousands were killed in heavy Russian bombing. That spawned an Islamic insurgency that has carried out deadly bombings in Russia and the region, although not in the West.
The older brother had strong political views about the United States, said Albrecht Ammon, 18, a downstairs-apartment neighbor in Cambridge. Ammon quoted Tsarnaev as saying that the U.S. uses the Bible as "an excuse for invading other countries."
the FBI interviewed the older brother at the request of a foreign government in 2011, and nothing derogatory was found, according to a federal law enforcement official who was not authorized to discuss the case publicly and spoke on condition of anonymity.
The official did not identify the foreign country or say why it made the request.
Tamerlan Tsarnaev had studied accounting as a part-time student at Bunker Hill Community College in Boston for three semesters from 2006 to 2008, the school said. He was married with a young daughter.
Dzhokhar Tsarnaev was registered as a student at the University of Massachusetts Dartmouth. Students said he was on campus this week after the Boston Marathon bombing. The campus closed down Friday along with colleges around the Boston area, and it remained closed Saturday as law enforcement continued investigating.
The men's father, Anzor Tsarnaev, said in a telephone interview with the AP from the Russian city of Makhachkala that his younger son, Dzhokhar, is "a true angel." He said his son was studying medicine.
"He is such an intelligent boy," the father said. "We expected him to come on holidays here."
The city of Cambridge announced two years ago that it had awarded a $2,500 scholarship to Dzhokar Tsarnaev. He was then a senior at Cambridge Rindge & Latin School, a highly regarded public school whose alumni include Matt Damon and Ben Affleck.
Shortly before Dzhokhar Tsarnaev's capture, the White House said Obama had spoken by phone with Russian President Vladimir Putin about the investigation.
The White House said in a statement that Obama "praised the close cooperation that the United States has received from Russia on counter-terrorism, including in the wake of the Boston attack."
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