Key developments in Boston marathon explosion 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. 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. 

 Residents flee from an area where a suspect was hiding on Franklin Street on April 19.

 Officers approach an area where a suspect was hiding on April 19.

 People react while watching police respond to reported gunfire on April 19.

 An ambulance carries Boston Marathon bombing suspect Dzhokhar Tsarnaev, 19, from the scene after he was apprehended in Watertown, Massachusetts, on April 19.

 An image posted to the social sharing website Reddit purports to show suspect Dzhokar Tsarnaev being detained by law enforcement officers.

 Police SWAT teams leave the area after apprehending the suspect in a yard where he was hiding in a dry-docked boat on April 19. 

 Members of a police SWAT team run to the scene where the suspect was hiding on April 19.

Police converge near the scene where the bombing suspect was hiding.

 SWAT team members run toward a police assault on a house as gunfire erupts on April 19.

 Family members react after police SWAT teams assaulted a house on their street on April 19.

 Police officers search house to house for the second suspect in a neighborhood of Watertown, Massachusetts, on Friday. 

 Members of a family who fled the scene near where the suspect was hiding talk with the authorities on Friday.

 Law enforcement officials evacuate people away from the area where the suspect was hiding.

 Police move in to the area where the suspect was hiding on Friday in Watertown, Massachusetts.

 SWAT team members move down residential streets as they perform door-to-door searches in Watertown, Massachusetts, on April 19.

 SWAT team members talk with Watertown, Massachusetts, residents while conducting door-to-door searches on April 19.

 A Watertown police vehicle with bullet holes in its body and a shattered windshield is towed out of the search area on April 19 in Watertown, Massachusetts.

 SWAT teams prepare to enter a home as they continue the door-to-door search.

 SWAT teams continue the ongoing manhunt in Watertown, Massachusetts.

 source: CNN