Boston Marathon bombing suspect Dzhokhar Tsarnaev, his arm in a cast and his face swollen, pleaded not guilty in his first appearance in public since his capture in mid-April.

A leading anti-death penalty lawyer who has managed to get life sentences for several high-profile criminals has joined the defence team representing the Boston Marathon bombing suspect.

A leading anti-death penalty lawyer who has managed to get life sentences for several high-profile criminals has joined the defence team representing the Boston Marathon bombing suspect.