It should be mandatory so the guilty cannot manipulate the system. Law enforcement officer should get this extra attention because they have sworn to uphold the Constitution and to protect the citizen of this country. We have seen how police officers have been singled out as targets because of the behavior of our spineless president and other high government officials. Let me add this; it is "cheaper to house" a prisoner for say 40-50 years than to kill them? Was there any thought put into that statement before it was typed?