The Hammer.

The judge says to a double-homicide defendant, "You are charged with beating your wife to death with a hammer." 

A voice at the back of the courtroom yells out, "You bastard."

The judge also says, "You're also charged with beating your mother in law to death with a hammer."

The voice in the back of the courtroom yells out, "You god-damned bastard."

The judge stops and says to the guy at the back of the courtroom, "Sir I can understand your anger and frustration at this crime. But no more outbursts from you or I will charge you with contempt. Is that a problem?"

The guy in the back of the courtroom stands up and says, "For fifteen years I have lived next door to that bastard, and every time I asked him if I could borrow a hammer, he said he didn't have one."