The extraordinary gun battle played out in front of Andrew Kitzenberg, who captured photos of the scene on his iPhone from his upstairs apartment on Dexter Street.

In one image taken by Kitzenberg, the two suspects are crouched behind the black SUV as they engage in gunfire. Kitzenberg said the two men had been transferring bags from a green sedan that one of the brothers drove to the scene.

At one point, Tamerlan approached police on foot, with explosives on his body and an explosive trigger, firing his handgun at the officers who returned fire, mortally wounding him. A police officer tackled him, then handcuffed him on the ground. Around the same time, Dzhokhar grabbed the wheel of the hijacked SUV and drove toward the police.

"As soon as the SUV turned around in the street," Kitzenberg told CNN's Drew Griffin, "it was accelerated gunfire."

At some point, Dzhokhar was shot and wounded. As he drove the SUV toward the officers who had restrained his brother, the police scrambled out of the way and Dzhokhar proceeds to drive over his brother.

Tamerlan later dies from the gunshot wound and the blunt force trauma of being run over, according to his death certificate.

http://www.cnn.com/2013/05/15/us/boston-watertown-shootout/index.html