Boston Marathon bomber files motion seeking new trial

Boston Marathon bomber Dzhokhar Tsarnaev, who has been sentenced to death, filed a motion in federal court on Monday seeking a new trial, according to court records.

The preliminary motion for a new trial cited a lack of evidence in his trial this spring, according to documents filed in federal court in Massachusetts.

Tsarnaev was convicted in April of killing three people and injuring 264 in the bombing near the finish line of the world-renowned Boston Marathon in 2013, as well as fatally shooting a police officer three days later.

The same jury voted for execution by injection in May.

At his formal sentencing on June 24, the 21-year-old ethnic Chechen apologized and admitted he and his now-dead older brother carried out the attack.