Story highlights Official: Others who know about Tsarnaev's laptop led authorities to search a dump 
 
 A gas station clerk says a carjacking victim came inside screaming, fearing for his life 
 
 Surviving suspect Dzhokhar Tsarnaev goes from a Boston hospital to a prison hospital 
 
 Source: Tsarnaev hasn't provided "substantive" info in days, but earlier info was helpful 
 
 As the surviving Boston bombing suspect lay in a prison hospital bed, investigators 90 miles away spent Friday combing a dump for his laptop and other clues that could shed light on the young men purportedly behind the bloody attack, a law enforcement official with knowledge of the investigation said. 
 
 Information from Dzhokhar Tsarnaev himself spurred authorities to look through the New Bedford, Massachusetts, landfill, the official told CNN's Susan Candiotti. Others who may have knowledge of the computer's whereabouts or may have played a role in disposing of it also provided leads that led to the search, according to a U.S. law enforcement official close to the Boston investigation. 
 
 The 19-year-old Tsarnaev went to school -- at the University of Massachusetts-Dartmouth -- in town adjacent to New Bedford, and he was spotted in his dorm room there in the days after the April 15 twin blasts that left three dead. 
 
 Tsarnaev has not given investigators any substantive information since officials informed him of his constitutional rights prior to charging him with use of and conspiracy to use a weapon of mass destruction, the source said Friday. 
 
 But the the source described the earlier bedside questioning -- which took place in two rounds during parts of Saturday, Sunday and Monday, New York police Commissioner Ray Kelly had said -- as "very thorough" and said investigators do not feel hamstrung. 
 
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 These first interviews took place at Boston's Beth Israel Deaconess Medical Center, where Dzhokhar Tsarnaev had been held since his capture a week ago. 
 
 Latest developments in the Boston bombings probe 
 
 Beth Israel is one of several hospitals that treated the more than 260 people injured in the Boston Marathon attack allegedly pulled off by Dzhokhar and his older brother Tamerlan. Some 30 of them remained hospitalized late Friday afternoon, including one in critical condition, according to a CNN tally. 
 
 In recent days, Dzhokhar Tsarnaev has improved enough that he'd been able to sit and was writing, a law enforcement official said. 
 
 At 3:30 a.m., the official said, he was transferred from Beth Israel to Federal Medical Center Devens some 40 miles away. 
 
 The federal Bureau of Prisons hospital, located on the grounds of the former Fort Devens U.S. military base, is designed for patients requiring ongoing medical care, according to the facility's website. 
 
 Dzhokhar Tsarnaev had what appeared to be gunshot wounds to his head, neck, legs and hand when he was captured April 19 after a nearly 24-hour manhunt, according to the criminal complaint accusing him in the marathon blasts. His 26-year-old brother died after a gunfight hours earlier. 
 
 Photos: Galleries from the attack and aftermath 
 
 Despite vow, suspects' father still in Russia 
 
 The suspects' parents, meanwhile, are in Russia. Their mother Zubeidat Tsarnaev told CNN on Friday that she and her husband had left their home in Dagestan for another part of Russia. 
 
 The brothers' father, Anzor Tsarnaev, had said he'd planned to travel to the United States. But that trip has been delayed indefinitely for health reasons, Zubeidat Tsarnaev told CNN's Nick Paton Walsh. She wouldn't elaborate. 
 
 The mother will not be flying to the United States, where she is wanted on felony charges of shoplifting and destruction of property. 
 
 The family lived in Massachusetts before Zubeidat Tsarnaev jumped bail after her arrest on the charges in 2012. The parents moved to Dagestan, a semiautonomous republic in southern Russia that year. 
 
 Russian authorities raised concerns in 2011 to U.S. authorities about Zubeidat and her son Tamerlan, sources told CNN. They asked both the FBI and CIA, separately, about Tamerlan, source said. 
 
 But a U.S. official said that the Russian's case at the time was "thin," though U.S. authorities did add both their names to the Terrorist Identities Datamart Environment, or TIDE, database -- which includes over a half million names -- an intelligence official said. Even so, U.S. authorities have come under fire at home, with lawmakers asking if the FBI and CIA failed to share information. 
 
 In an interview with CNN on Thursday, Zubeidat Tsarnaev said she didn't want to accept the reality of the bombing, saying it was fake. She said she has seen a video pushing the wild idea, and that there was no blood, that paint was used instead. 
 
 Suspects' mother describes her last conversation with her sons 
 
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 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tamerlan Tsarnaev, one of the Boston Marathon bombing suspects, was the subject of an April 2009 photo essay that appeared in a graduate school magazine at Boston University. According to the article, he had hoped to become a naturalized American and make the U.S. Olympic boxing team. Authorities say an overnight shootout with police left him dead on April 19, 2013. Hide Caption 1 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev answers a call while walking to boxing practice at the Wai Kru Mixed Martial Arts center in Boston. Hide Caption 2 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev practices boxing at the Wai Kru Mixed Martial Arts center. Hide Caption 3 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev shows how he strengthens his ankles, according to the photo essay. The photographer did not want to be named for this story. Hide Caption 4 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Though he had lived in the United States for five years, Tsarnaev said in the essay: "I don't have a single American friend. I don't understand them." Hide Caption 5 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev works out. Hide Caption 6 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev stretches during boxing practice. Hide Caption 7 of 8 Boston bombings suspect: Tamerlan Tsarnaev 8 photos Tsarnaev tapes up his hand. Hide Caption 8 of 8 EXPAND GALLERY 
 
 Nonetheless, she broke down when she spoke of the victims. 
 
 "I really feel sorry for all of them. Really feel sorry for all of them," she said, her voice cracking even as she remained resolute that her sons were not involved. 
 
 Official: U.S. wars in Afghanistan, Iraq motivated bombings 
 
 Putin regrets Russia couldn't give U.S. more info 
 
 While insisting Russian and U.S. authorities often work together, Russian President Vladimir Putin on Thursday said that -- though authorities in Washington were tipped off, to some extent -- he wished they could have done something more that might have prevented the Boston attack. 
 
 "The Russian (authorities), to my great regret, were not able to provide our American colleagues with information that would have operative significance," Putin said. 
 
 Dead Boston bomb suspect posted video of jihadist, analysis shows 
 
 In his first on-camera comments since the bombing, the Russian leader added he hoped that the bombings might spur more cooperation between the two nations. 
 
 "If we combine our efforts, we will not suffer blows like that," he said during a live televised call-in session in Moscow on Thursday. 
 
 Putin also lashed out against those in the West who have slammed Russia for human rights abuses in its actions toward Chechnya. 
 
 "Russia is among the first victims, and I hate it when our Western partners call our terrorists who committed some heinous crimes in Russia ... freedom fighters... They supported them," said Putin, accusing unnamed people or groups of providing Russia's foes with political, financial and "media" support. 
 
 Report: Carjacked man describes wild ordeal 
 
 Based on investigative leads and information provided by Dzhokhar Tsarnaev, investigators believe that each of the brothers had their own remote control device to detonate bombs near the marathon's finish line, said a law enforcement official with knowledge of the investigation on Friday. 
 
 The previous day, a law enforcement official said at least one of the bombs that exploded was set off by remote control. 
 
 Tragedy in Boston: How to help 
 
 Three days after that attack, and hours after authorities released images of two suspects, they "spontaneously" decided to go to New York's Times Square to blow up their six remaining explosives, Dzhokhar Tsarnaev told investigators. 
 
 But a botched carjacking spoiled the impromptu road trip, said Tsarnaev, whose account was outlined Thursday by New York's police commissioner. 
 
 "We don't know that we would have been able to stop the terrorists had they arrived here from Boston," Mayor Michael Bloomberg said. "We're just thankful that we didn't have to find out that answer." 
 
 Before forcing their way into the vehicle the night of April 18, the brothers shot dead a campus police officer at the Massachusetts Institute of Technology, police said. 
 
 The hijacked vehicle, a Mercedes SUV, ran low on fuel and they stopped at a service station, where the vehicle's owner escaped. Shortly thereafter, police picked up the trail of the SUV. A pursuit followed, during which, authorities say, the men were throwing the bombs out the vehicle's window at them. The gun battle and Tamerlan Tsarnaev's death followed. 
 
 In a Boston Globe story, the man who was carjacked -- a 26-year-old Chinese entrepreneur identified only as Danny -- described his 90-minute ordeal, from when a man brandishing a silver handgun got into his Mercedes to when he ran for his life into a Mobil gas station's supply room. 
 
 During this time, Danny told the Globe, the gun-wielding man confessed to pulling off the Boston bombing and to killing a police officer in Cambridge, Massachusetts, where MIT's campus is located. 
 
 Together they crisscrossed around the Boston area, at one point stopping for gas and another time so that another person could join them in the car. Danny recognized both men from the photos released by the FBI earlier on April 18, men who authorities now say were Tamerlan and Dzhokhar Tsarnaev. 
 
 The carjackers openly discussed traveling to New York, before Danny was able to run to safety. 
 
 "He fell down, screaming, 'Please, please call ... the police. They want to kill me. They have a gun, they have a bomb,''" Tarek Ahmed, the clerk working in the gas station at the time, told CNN's Piers Morgan. 
 
 Danny first hid at the front counter, then went to a storage room. Ahmed, after first making sure this man wasn't one of the bombing suspects and separately thinking he might be drunk, quickly picked up a phone and called 911. 
 
 "I was waiting (for) someone to shoot me at this moment," Ahmed said, adding he couldn't see outside from where he called. "I was waiting to die ... I wanted to finish my call very fast with the police." 
 
 Within five minutes, the gas station was teeming with police. And a short time later, after a chase in which the suspects allegedly shot at police and threw bombs out their windows, Tamerlan Tsarnaev was dead. His brother was captured about 20 hours later. 
 
 James Alan Fox -- a criminology professor at Northeastern University, where Danny had been a student, and who has spent considerable time with him over recent days -- told CNN that the carjacking victim "doesn't like to see himself as a hero." 
 
 "After all, he says, 'I was only trying to save myself,'" Fox said. "But ... his actions, his composure, his smarts were what led this case to a close and may have indeed saved thousands of Americans if we believe, in fact, that (the Boston suspects) had plans to do more bombings in New York City." 
 
 Suspect's widow is assisting investigation, lawyer says ||||| Boston bombing suspect Dzhokhar Tsarnaev has been moved to a Massachusetts prison facility from the hospital he has been held in for a week. 
 
 The surviving suspect in the Boston Marathon bombings has been moved from the hospital to a federal prison 40 miles away that provides specialized medical care, the government said Friday. 
 
 Dzhokhar Tsarnaev was moved from Beth Israel Deaconess Medical Center, where he has been held and interrogated since his capture last week, to the federal prison at Fort Devens, Mass., the Marshals Service said. 
 
 Elise Amendola / AP Devens Federal Medical Center is seen in Devens, Mass., in 2011. 
 
 The prison’s website describes it as a facility for men who need specialized or long-term medical or mental health care. 
 
 The most prominent inmate there is Raj Rajaratnam, who in 2011 was sentenced to 11 years in prison for insider trading. He has diabetes, and the prison has a dialysis center. 
 
 The prison is in a wooded setting on a military base that was decommissioned in 1996. Another inmate there is Sabri Benkahla, who is serving 10 years for lying to authorities about training with militants in Pakistan. Benkahla was accused of being part of an American group that trained with paintball guns. He is scheduled for release in 2016. 
 
 Roger Stockham, a Southern California man who was accused in January 2011 of plotting to blow up a mosque outside Detroit, served at Fort Devens and was released late last year. Stockham has a long criminal history that includes holding a psychiatrist hostage, kidnapping his son, trying to hijack a plane and threatening to kill the president. 
 
 A lawyer who has had clients sentenced to Fort Devens told The Hartford Courant in 2005 that the prison has an outdoor basketball court. Crafts, including woodworking and making leather goods, are popular, the lawyer told the newspaper — though it is not clear how restricted Tsarnaev will be. 
 
 At the time, a judge had recommended that John Rowland, a former Connecticut governor who pleaded guilty to a corruption charge, be assigned to Fort Devens. Instead he served about 10 months at a federal prison in Pennsylvania. 
 
 In 1918, during a flu pandemic that killed tens of millions of people around the world, there was a severe outbreak at what was then known as Camp Devens — a ghastly scene of piled up corpses and cots overflowing onto porches. 
 
 The outbreak came in the last days of World War I. According to an account published by the Johns Hopkins School of Public Health, men at Devens were so sick that their oxygen-deprived skin turned deep blue. 
 
 The decision on where to send federal inmates is made by the Bureau of Prisons, which does not generally disclose its reasons for assigning prisoners. 
 
 Boston police could be seen early Friday leaving the hospital, which has treated not just Tsarnaev but people injured in the marathon blasts April 15. 
 
 Tsarnaev, 19, was upgraded earlier this week to fair condition from serious. His injuries, including a gunshot wound to the head and neck that may have been self-inflicted, were so severe that he initially communicated with investigators by moving his head and in writing. 
 
 He also has injuries to the leg and hand, apparently from a firefight with police in suburban Watertown, Mass., on April 19 that played out about 12 hours before Tsarnaev was captured hiding in a boat parked in the driveway of a house. 
 
 New York authorities said Thursday that Tsarnaev had improved to the point that he could talk, and that in a second round of questioning he admitted that he and his brother decided on the run to carry out a second attack in Times Square. His brother, Tamerlan, was killed after the shootout. 
 
 Tsarnaev has been charged with federal crimes including conspiring to use a weapon of mass destruction, and Attorney General Eric Holder could decide to seek the death penalty. 
 
 Tsarnaev has told investigators that he and his brother acted alone when they built and detonated two pressure-cooker bombs near the finish line of the marathon. Three people were killed in the attack and more than 200 injured. 
 
 Dzhokhar Tsarnaev told investigators that the brothers were motivated by a desire to defend Islam after the American-led wars in Iraq and Afghanistan. 
 
 In prison, experts have said, Tsarnaev will probably be subject to special administrative measures that could sharply curtail his contact with fellow prisoners and the outside world. Stephen Huggard, a former Boston federal prosecutor who worked on the Sept. 11 investigation, said Tsarnaev’s parents, who are in Russia and have insisted he’s being framed, may not be allowed to visit. 
 
 At a hospital court room hearing earlier this week, Tsarnaev showed little sign of fear or remorse and his heart monitor didn’t register a blip when he was told he could be could be facing the death penalty, according to a source familiar with the events inside the room when he was read his rights. 
 
 The mother of the Tsarnaev brothers insisted Thursday that her sons are not responsible for the attack and said she did not see any aggression in the older brother, even when the FBI questioned him two years ago. 
 
 Speaking to reporters in Russia, Zubeidat Tsarnaeva also said the elder son, Tamerlan Tsarnaev, came to Russia for six months last year to attend a family wedding, visit relatives and later renew his Kyrgyzstan passport. 
 
 “America took my kids away from me,” she said. “I’m sure my kids were not involved in anything.” 
 
 U.S. investigators have said they want to know more about why Tamerlan Tsarnaev was in Russia. When he returned to the United States in July, he began posting radical Islamic videos to his YouTube account. 
 
 Matthew DeLuca of NBC News contributed to this report. 
 
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– Boston is now rid of Dzhokhar Tsarnaev, who has been transferred to a federal prison medical facility about 40 miles west of the city. "Dzhokhar Tsarnaev has been transported from the Beth Israel Deaconess Medical Center and is now confined at the Bureau of Prisons facility FMC Devens at Ft. Devens, Massachusetts," says an official. The amount of time he spends at the local facility hinges on whether prosecutors decide to pursue execution, NBC News notes. Attorney General Eric Holder will ultimately make the call, but he likely won't do so for several months. Meanwhile, Tsarnaev's parents have left their home in Dagestan—but they're not headed to the US, at least for now. Instead, they're going elsewhere in Russia, CNN reports. Zubeidat Tsarnaeva cites her husband's health; she called him an ambulance yesterday, but gave no details on his condition. (Meanwhile, the Tsarnaevs' carjacking victim tells his story.)