US anti-virus software pioneer John McAfee gestures as he arrives at the Aurora international airport in Guatemala City on December 12, 2012. MADRID (AP) - John McAfee, the creator of the McAfee antivirus software, has been found dead in his cell in a jail near Barcelona, a government official told The Associated Press on Wednesday.Hours earlier, a Spanish court issued a preliminary ruling in favor of his extradition to the United States to face tax-related criminal charges.Security personnel at the Brians 2 penitentiary near the northeastern Spanish city tried to revive McAfee, who was 75, but the jail’s medical team finally certified his death, a statement from the regional Catalan government said.The statement didn’t identify the U.S..