JOINT BASE LEWIS-MCCHORD, Wash. - The defense has rested it's case in the sentencing hearing of the U.S. soldier who massacred 16 Afghan civilians. Testimony in the case of Staff Sgt. Robert Bales finished Thursday at a military base in Tacoma with the defendant apologizing to his victims and fellow troops. Bales says the killings were an "act of cowardice" and he would bring back his victims "in a heartbeat" if he could. Lawyers are to present closing arguments Friday over whether Bales should ever have a chance of parole from a life sentence. He pleaded guilty in June to avoid the death penalty.