As SWAT officers moved in to capture Boston Marathon bombing suspect Dzhokhar Tsarnaev, who was hiding in a boat parked in a residential backyard, they didn’t know whether he had a gun or explosives that he could use against them.
So they approached from behind a Kevlar shield, focusing intently on the suspect's hands.
"You could see one hand was clear of any weapons, but each time he went the other way, his hand went down inside the boat, out of our view. And I know everybody here -- we've spoken about it. Each time he did that, we had to assume that he was reaching for either a weapon, a firearm, or some type of explosive ignition device to try to draw us in and then take us out in a suicide-type manner," Officer Jeff Campbell of the Massachusetts Bay Transit Authority said on CNN on Monday.
But the team of officers and detectives kept approaching, eventually getting close enough to see both hands were empty.
"We broke away from the shield protective cover and just rushed him," Campbell said.
After cuffing Tsarnaev, who was in and out of consciousness because of blood loss, the officers examined his body for explosives and found none. But they feared that he could have rigged the boat.