The hammer!

The judge says to a double-homicide defendant, "You're charged with beating your wife to death with a hammer." A voice at the back of the courtroom yells out, "You bastard." The judge 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 in the back of the courtroom, "Sir, I can understand your anger and frustration at this crime. But no more outbursts from you, or I'll charge you with contempt. Is that a problem?" The guy in the back of the court stands up and says, "For fifteen years, I've lived next door to that bastard, and every time I asked to borrow a hammer, he said he didn't have one."