Manhunt for Boston bombers, Key developments in Boston bombings investigation

<div dir="ltr" style="text-align: left;" trbidi="on"><img alt="An officer carries a child away from an area where a suspect was hiding on Franklin Street on Friday, April 19, in Watertown, Massachusetts. After a car chase and shootout with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, was shot and killed by police early Friday, and his brother and second suspect, Dzhokhar Tsarnaev, was taken into custody Friday night. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170. " src="http://i2.cdn.turner.com/cnn/dam/assets/130419224204-79-boston-manhunt-horizontal-gallery.jpg" /><br /><span style="background-color: rgba(0, 0, 0, 0.952941); color: white; font-family: arial; font-size: 12px; line-height: 14px;">An officer carries a child away from an area where a suspect was hiding on Franklin Street on Friday, April 19, in Watertown, Massachusetts. After a car chase and shootout with police, one suspect in the Boston Marathon bombing, Tamerlan Tsarnaev, was shot and killed by police early Friday, and his brother and second suspect, Dzhokhar Tsarnaev, was taken into custody Friday night. The two men are suspects in the bombings at the Boston Marathon on April 15, that killed three people and wounded at least 170.</span><br /><span style="background-color: rgba(0, 0, 0, 0.952941); color: white; font-family: arial; font-size: 12px; line-height: 14px;"><br /></span><img alt="Residents flee from an area where a suspect was hiding on Franklin Street on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419224207-80-boston-manhunt-horizontal-gallery.jpg" /><img alt="Officers approach an area where a suspect was hiding on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419224210-81-boston-manhunt-horizontal-gallery.jpg" /><br /><img alt="People react while watching police respond to reported gunfire on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419224305-82-boston-manhunt-horizontal-gallery.jpg" /><br /><img alt="Members of a police SWAT team run to the scene where the suspect was hiding on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419203928-73-boston-manhunt-horizontal-gallery.jpg" /><br /><img alt="SWAT team members run toward a police assault on a house as gunfire erupts on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419203822-01-manhunt-boston-horizontal-gallery.jpg" /><br /><img alt="Police officers search house to house for the second suspect in a neighborhood of Watertown, Massachusetts, on Friday. " src="http://i2.cdn.turner.com/cnn/dam/assets/130419203827-03-manhunt-boston-horizontal-gallery.jpg" /><br /><img alt="SWAT team members move down residential streets as they perform door-to-door searches in Watertown, Massachusetts, on April 19. " src="http://i2.cdn.turner.com/cnn/dam/assets/130419191411-68-boston-manhunt-0419-horizontal-gallery.jpg" /><br /><img alt="SWAT team members talk with Watertown, Massachusetts, residents while conducting door-to-door searches on April 19." src="http://i2.cdn.turner.com/cnn/dam/assets/130419191146-69-boston-manhunt-0419-horizontal-gallery.jpg" /><br /><img alt="SWAT teams prepare to enter a home as they continue the door-to-door search." src="http://i2.cdn.turner.com/cnn/dam/assets/130419190029-66-boston-manhunt-0419-horizontal-gallery.jpg" /><span style="background-color: rgba(0, 0, 0, 0.952941); color: white; font-family: arial; font-size: 12px; line-height: 14px;">SWAT teams prepare to enter a home as they continue the door-to-door search.</span><br /><img alt="SWAT teams continue the ongoing manhunt in Watertown, Massachusetts." src="http://i2.cdn.turner.com/cnn/dam/assets/130419185629-67-boston-manhunt-0419-horizontal-gallery.jpg" /><span style="background-color: rgba(0, 0, 0, 0.952941); color: white; font-family: arial; font-size: 12px; line-height: 14px;">SWAT teams continue the ongoing manhunt in Watertown, Massachusetts.</span><br /><br /><div style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">(CNN)</strong> -- The hours since the FBI released images of the two men suspected in this week's Boston Marathon bombings has been rife with new developments in the case. Among them:</div><div class="cnn_storypgraphtxt cnn_storypgraph2" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">Overnight dram</strong><strong style="margin: 0px; padding: 0px;">a</strong><strong style="margin: 0px; padding: 0px;">:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph3" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Late Thursday, police respond to a call on the campus of the Massachusetts Institute of Technology, where university police officer Sean Collier, 26, was shot. He died from his injuries. Police believe the bombing suspects were responsible for the shooting.</div><div class="cnn_storypgraphtxt cnn_storypgraph4" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Police say the two suspects hijack a car at gunpoint in Cambridge, Massachusetts, taking the driver as a hostage. The suspects tell the driver that they are the Boston marathon bombers, a law enforcement source said</div><div class="cnn_storypgraphtxt cnn_storypgraph5" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The hostage is released at a gas station a short time later.</div><div class="cnn_storypgraphtxt cnn_storypgraph6" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The two suspects pulled over to transfer materials into their new car, then threw one grenade and five pipe bombs at police chasing them, one FBI and one Department of Homeland Security official told CNN. Three of those explosives detonated, two did not, the officials said.</div><div class="cnn_storypgraphtxt cnn_storypgraph7" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Police, who were tracking the vehicle using its built-in GPS system, pick up the chase in Watertown. The pursuit goes into a residential neighborhood, with the suspects throwing explosives and firing shots at officers, police say.</div><div class="cnn_storypgraphtxt cnn_storypgraph8" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">Officers fire back, striking a man later identified as 26-year-old Tamerlan Tsarnaev. The man -- who was suspect No. 1 in the images released late Thursday afternoon by the FBI -- was wearing explosives and an explosive trigger when his body was recovered, a source briefed on the investigation tells CNN.</div><div class="cnn_storypgraphtxt cnn_storypgraph9" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Authorities later announce that they recovered a pressure-cooker bomb following the pursuit into Watertown, a source briefed on the ongoing investigation said. They also recovered a significant amount of homemade explosives" in Watertown, Massachusetts State Police spokesman David Procopio said.</div><div class="cnn_storypgraphtxt cnn_storypgraph10" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">Boston area locked down</strong><strong style="margin: 0px; padding: 0px;">:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph11" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Around 2 a.m., police begin ordering Watertow<strong style="margin: 0px; padding: 0px;"> (CNN)</strong> -- The hours since the FBI released images of the two men suspected in this week's Boston Marathon bombings has been rife with new developments in the case. Among them:</div><div class="cnn_storypgraphtxt cnn_storypgraph2" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">Overnight dram</strong><strong style="margin: 0px; padding: 0px;">a</strong><strong style="margin: 0px; padding: 0px;">:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph3" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Late Thursday, police respond to a call on the campus of the Massachusetts Institute of Technology, where university police officer Sean Collier, 26, was shot. He died from his injuries. Police believe the bombing suspects were responsible for the shooting.</div><div class="cnn_storypgraphtxt cnn_storypgraph4" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Police say the two suspects hijack a car at gunpoint in Cambridge, Massachusetts, taking the driver as a hostage. The suspects tell the driver that they are the Boston marathon bombers, a law enforcement source said</div><div class="cnn_storypgraphtxt cnn_storypgraph5" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The hostage is released at a gas station a short time later.</div><div class="cnn_storypgraphtxt cnn_storypgraph6" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The two suspects pulled over to transfer materials into their new car, then threw one grenade and five pipe bombs at police chasing them, one FBI and one Department of Homeland Security official told CNN. Three of those explosives detonated, two did not, the officials said.</div><div class="cnn_storypgraphtxt cnn_storypgraph7" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Police, who were tracking the vehicle using its built-in GPS system, pick up the chase in Watertown. The pursuit goes into a residential neighborhood, with the suspects throwing explosives and firing shots at officers, police say.</div><div class="cnn_storypgraphtxt cnn_storypgraph8" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">Officers fire back, striking a man later identified as 26-year-old Tamerlan Tsarnaev. The man -- who was suspect No. 1 in the images released late Thursday afternoon by the FBI -- was wearing explosives and an explosive trigger when his body was recovered, a source briefed on the investigation tells CNN.</div><div class="cnn_storypgraphtxt cnn_storypgraph9" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Authorities later announce that they recovered a pressure-cooker bomb following the pursuit into Watertown, a source briefed on the ongoing investigation said. They also recovered a significant amount of homemade explosives" in Watertown, Massachusetts State Police spokesman David Procopio said.</div><div class="cnn_storypgraphtxt cnn_storypgraph10" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">Boston area locked down</strong><strong style="margin: 0px; padding: 0px;">:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph11" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Around 2 a.m., police begin ordering Watertown residents to turn off their cell phones.</div><div class="cnn_storypgraphtxt cnn_storypgraph12" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- At least 12 universities and colleges, along with Boston Public Schools and Cambridge Public Schools, announce Friday morning that they will be closed for the day due to police activity.</div><div class="cnn_storypgraphtxt cnn_storypgraph13" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Authorities later Friday ask that people in Watertown, Boston and Cambridge -- where the two suspects lived -- not leave their homes, as authorities try to hunt down the remaining suspect.</div><div class="cnn_storypgraphtxt cnn_storypgraph14" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The University of Massachusetts-Dartmouth -- where suspect No. 1, Dzhokhar Tsarnaev, was an enrolled student -- is evacuated. Law enforcement personnel swarm the campus, which is located just west of New Bedford and about 60 miles south of Boston.</div><div class="cnn_storypgraphtxt cnn_storypgraph15" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Numerous activities scheduled for Friday night are canceled around Boston -- including Boston Red Sox and Boston Bruins games, as well as a Big Apple Circus show -- due to the ongoing manhunt for the marathon bombing suspect.</div><div class="cnn_storypgraphtxt cnn_storypgraph16" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Amtrak train and Greyhound and regional Bolt Bus services were shut down. Taxi service across the city also was suspended for a time during the manhunt.</div><div class="cnn_storypgraphtxt cnn_storypgraph17" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Around 6 p.m., Gov. Deval Patrick said that the lockdown had been lifted and that mass transit service had resumed.</div><div class="cnn_storypgraphtxt cnn_storypgraph18" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- About an hour later at 7:03 p.m., the Boston Police Department tweeted that there are "police operations" on Franklin Street in Watertown. CNN crew at the scene heard gunshots and saw several law enforcement vehicles race toward the scene.</div><div class="cnn_storypgraphtxt cnn_storypgraph19" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">The suspects:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph20" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The Tsarnaev brothers came from the Russian Caucasus region and moved to Kazakhstan at a young age before coming to the United States several years ago. Dzhokhar Tsarnaev was 8 years old at the time, their mother Zubeidat Tsarnaeva told state-run Russia Today from Dagestan.</div><div class="cnn_storypgraphtxt cnn_storypgraph21" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- A federal official told CNN that Dzhokar Tsarnaev came to the U.S. as a tourist with his family in the early 2000s and later asked for asylum. He became a naturalized U.S. citizen in 2012.</div><div class="cnn_storypgraphtxt cnn_storypgraph22" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Dzhokar -- a University of Massachusetts-Dartmouth student -- was one of 45 high school seniors awarded a $2,500 scholarship by the Massachusetts city of Cambridge.</div><div class="cnn_storypgraphtxt cnn_storypgraph23" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Tamerlan Tsarnaev was not a naturalized citizen, said the official, who spoke on condition of anonymity. He came "a few years later" and was lawfully in the United States as a green-card holder.</div><div class="cnn_storypgraphtxt cnn_storypgraph24" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Tamerlan Tsarnaev studied engineering at Bunker Hill Community College just outside Boston, but had taken the year off to train as a boxer, sources told CNN.</div><div class="cnn_storypgraphtxt cnn_storypgraph25" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- In 2009, Tamerlan competed in a Golden Gloves match -- heavyweight division -- in Salt Lake City, losing in the first round.</div><div class="cnn_storypgraphtxt cnn_storypgraph26" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Dzhokar Tsarnaev's friends expressed shock about his suspected involvement in the bombings, with his Cambridge Rindge and Latin high school classmate Eric Mercado telling CNN "there were no telltale signs of any kind of malicious behavior."</div><div class="cnn_storypgraphtxt cnn_storypgraph27" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Larry Aaronson, Dzhokar Tsarnaev's neighbor and a former teacher at the high school Tsarnaev attended, described him as "caring," "jovial" and "so grateful to be here."</div><div class="cnn_storypgraphtxt cnn_storypgraph28" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The mother of the Tsarnaev brothers refused to believe they were involved in the marathon bombings and subsequent shootout. "It's impossible for them to do such things. I am really telling you that this is a setup," she said.</div><div class="cnn_storypgraphtxt cnn_storypgraph11" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Their father, Anzor Tsarnaev, told Russian state-run Zvezda TV, accused someone of framing his sons. "I don't know who exactly did it. But someone did," he said. n residents to turn off their cell phones.</div><div class="cnn_storypgraphtxt cnn_storypgraph12" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- At least 12 universities and colleges, along with Boston Public Schools and Cambridge Public Schools, announce Friday morning that they will be closed for the day due to police activity.</div><div class="cnn_storypgraphtxt cnn_storypgraph13" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Authorities later Friday ask that people in Watertown, Boston and Cambridge -- where the two suspects lived -- not leave their homes, as authorities try to hunt down the remaining suspect.</div><div class="cnn_storypgraphtxt cnn_storypgraph14" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The University of Massachusetts-Dartmouth -- where suspect No. 1, Dzhokhar Tsarnaev, was an enrolled student -- is evacuated. Law enforcement personnel swarm the campus, which is located just west of New Bedford and about 60 miles south of Boston.</div><div class="cnn_storypgraphtxt cnn_storypgraph15" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Numerous activities scheduled for Friday night are canceled around Boston -- including Boston Red Sox and Boston Bruins games, as well as a Big Apple Circus show -- due to the ongoing manhunt for the marathon bombing suspect.</div><div class="cnn_storypgraphtxt cnn_storypgraph16" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Amtrak train and Greyhound and regional Bolt Bus services were shut down. Taxi service across the city also was suspended for a time during the manhunt.</div><div class="cnn_storypgraphtxt cnn_storypgraph17" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Around 6 p.m., Gov. Deval Patrick said that the lockdown had been lifted and that mass transit service had resumed.</div><div class="cnn_storypgraphtxt cnn_storypgraph18" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- About an hour later at 7:03 p.m., the Boston Police Department tweeted that there are "police operations" on Franklin Street in Watertown. CNN crew at the scene heard gunshots and saw several law enforcement vehicles race toward the scene.</div><div class="cnn_storypgraphtxt cnn_storypgraph19" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;"><strong style="margin: 0px; padding: 0px;">The suspects:</strong></div><div class="cnn_storypgraphtxt cnn_storypgraph20" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The Tsarnaev brothers came from the Russian Caucasus region and moved to Kazakhstan at a young age before coming to the United States several years ago. Dzhokhar Tsarnaev was 8 years old at the time, their mother Zubeidat Tsarnaeva told state-run Russia Today from Dagestan.</div><div class="cnn_storypgraphtxt cnn_storypgraph21" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- A federal official told CNN that Dzhokar Tsarnaev came to the U.S. as a tourist with his family in the early 2000s and later asked for asylum. He became a naturalized U.S. citizen in 2012.</div><div class="cnn_storypgraphtxt cnn_storypgraph22" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Dzhokar -- a University of Massachusetts-Dartmouth student -- was one of 45 high school seniors awarded a $2,500 scholarship by the Massachusetts city of Cambridge.</div><div class="cnn_storypgraphtxt cnn_storypgraph23" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Tamerlan Tsarnaev was not a naturalized citizen, said the official, who spoke on condition of anonymity. He came "a few years later" and was lawfully in the United States as a green-card holder.</div><div class="cnn_storypgraphtxt cnn_storypgraph24" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Tamerlan Tsarnaev studied engineering at Bunker Hill Community College just outside Boston, but had taken the year off to train as a boxer, sources told CNN.</div><div class="cnn_storypgraphtxt cnn_storypgraph25" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- In 2009, Tamerlan competed in a Golden Gloves match -- heavyweight division -- in Salt Lake City, losing in the first round.</div><div class="cnn_storypgraphtxt cnn_storypgraph26" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Dzhokar Tsarnaev's friends expressed shock about his suspected involvement in the bombings, with his Cambridge Rindge and Latin high school classmate Eric Mercado telling CNN "there were no telltale signs of any kind of malicious behavior."</div><div class="cnn_storypgraphtxt cnn_storypgraph27" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Larry Aaronson, Dzhokar Tsarnaev's neighbor and a former teacher at the high school Tsarnaev attended, described him as "caring," "jovial" and "so grateful to be here."</div><div class="cnn_storypgraphtxt cnn_storypgraph28" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- The mother of the Tsarnaev brothers refused to believe they were involved in the marathon bombings and subsequent shootout. "It's impossible for them to do such things. I am really telling you that this is a setup," she said.</div><div class="cnn_storypgraphtxt cnn_storypgraph29" style="background-color: white; border: 0px; font-family: arial; font-size: 14px; line-height: 19px; padding: 0px 24px 19px 186px; vertical-align: baseline;">-- Their father, Anzor Tsarnaev, told Russian state-run Zvezda TV, accused someone of framing his sons. "I don't know who exactly did it. But someone did," he said.</div></div>

CNN Manhunt for Boston bombers, Key developments in Boston bombings investigation

An officer carries a child away from an area where a suspect was hiding on Franklin Street on Friday, April 19, in Watertown, Massachusetts....

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