Defense attorney Don West used a joke in his opening statements to set the tune of the defence' case.    "Knock. Knock," West said.    "Who is there?"    "George Zimmerman."    "George Zimmerman who?"    "Ah, good. You're on the jury." The state prosecutor John Guy " there is no evidence to back up other claims by Zimmerman, including that Martin had his hands over Zimmerman's mouth,none of Zimmerman's DNA was found on Martin's body and Zimmerman's claim that he had to fire because Martin was reaching for his firearm is false since none of Martin's DNA was on the gun or holster.