Well you are way behind the times, pal.
You need to check out the "shoot to kill", fully autonomous South Korean military robots patrolling the DMZ. ;-)
For the record, at a minimum I support fully autonomous fighter aircraft. The X-37B is a fully autonomous bomber, although in effect we've had those since the '80s in the form of the Tomahawk cruise missile...
"Killer robots" is a technology that already happened.
Whoops, typo “X-47B”.
Another earlier proto type robot developed in South Korea ...
“South Korea Unveils Robotic Prison Guards, Promises Futuristic Cavity Searches”
http://www.freerepublic.com/focus/f-chat/2888874/posts