In the Old Testament, atonement was made when a penitent sinner offered a sacrifice on behalf of the sins he had committed. In the New Testament, atonement was made when Jesus Christ offered Himself as a sacrifice on the cross of Calvary. Nowhere in the Bible do we read of a person being saved as a result of capital punishment. Never is it implied that a remission of sins would be granted based on a perpetrator shedding his own blood. As the great sacrifice, Christ's blood needed only to be shed once for all of the sins of His people.
Further sacrifices are no longer necessary.
By the which will we are sanctified through the offering of the body of Jesus Christ once for all.