Tsarnaev was convicted of all 30 charges against him, including conspiracy and use of a weapon of mass destruction and the killing of Massachusetts Institute of Technology Police Officer Sean Collier during the getaway attempt. Prosecutors said the brothers carried out the attack to punish the U.S. for wars in Muslim countries.

President Biden is granting clemency to 37 of the 40 federal inmates facing death sentences​. Their sentences will be commuted to life in prison without the possibility of parole.