Video shows moments before suspect's capture
WATERTOWN, Mass. (WHDH) -- New video shows the moment the Boston Marathon bombing suspect was captured in Watertown.
The video was shot from the air - but it gave investigators a clear picture of what they'd have to deal with on the ground. The video gives insight to what happened in the moment's leading to a terror suspect's capture.
A thermal imaging camera confirmed it - suspect number two was alive and moving - as a manhunt came to a close.
The situation on the ground was so tense that state police investigators used a helicopter before moving in to get the bird's eye view of the Watertown backyard.
Images from the air showed a ladder positioned alongside the boat that Dzhokhar Tsarnaev was hiding in.
The video then shows investigators moving in with a robot, peeling back part of the tarp covering that boat.
Minutes later, a flash grenade was lobbed toward the boat. The goal was to disorient the suspect inside it, soon after, another flash grenade.
The video is so clear that you can make out the outline of Tsarnaev's head and feet while he lies nearly motionless.
Final images proved he was still alive - he could even be seen reaching a hand toward his face.
The video doesn't show the gunfire that witnesses heard on the ground. Hostage negotiators were brought in, they spoke to the suspect using a bullhorn before he was taken into custody.