John McAfee, the tech wizard who developed the McAfee anti-virus software in the 1980s and helped pioneer instant messaging in the 1990s, is wanted for questioning by Belize Police in connection with the murder of a neighbor and fellow American expatriate. Police say 52-year-old Gregory Faull was found dead in his tropical island hacienda on Sunday -- discovered lying face down in a pool of blood by his housekeeper. Police say he was shot in the back of the head. Gang Suppression Unit commander Marco Vidal told ABC News that McAfee was one of several individuals wanted for questioning. Belize Police spokesman Raphael Martinez also said that McAfee is one of several "persons of interest" in the inquiry.