McAfee, 67, claims even police didn't recognize him.
"I watched the police search my residence 7 times," he wrote. "At one point I got too close and was angrily ordered to go away. "
He claimed that other disguises included posing as a foul-mouthed German tourist spewing profanities.
"On subsequent days using different disguises, I did the same general thing, one day selling tamales and burritos that I had purchased wholesale from a real vendor, on another pretending to be a drunk German tourist with a partially bandaged face and wearing speedo swimming trunks and a distasteful, oversized Hawaiian shirt."
As with his other stories, it has been difficult to verify any of McAfee's claims. One resident who lives near McAfee's home, which is two doors down from Faull's, also doesn't remember seeing any of the three characters McAfee describes.
Faull was shot to death in early November. McAfee acknowledges that Faull had complained about his dogs, which were poisoned shortly before Faull's killing, but he says he didn't kill him.
"He did not like my dogs, but neither did any of my neighbors. I didn't like them myself sometimes, they did bark at night and they were annoying," McAfee said in the Saturday interview. "I did not kill the man and I had no reason to do so," he said, suggesting he had an alibi — something corroborated by at least one young woman who said she spent the night at McAfee's house the night Faull was murdered. "There were many people at the house with me."
McAfee, the creator of the McAfee antivirus program, has led a life of eccentricity since he sold his stake in the anti-virus software company that is named for him in the early 1990s and moved to Belize about three years ago to lower his taxes.
He told The New York Times in 2009 that he had lost all but $4 million of his $100 million fortune in the U.S. financial crisis. However, a story on the Gizmodo website quoted him as calling that claim "not very accurate at all." He has dabbled in yoga, ultra-light aircraft and producing herbal medications.
Neighbors say McAfee seemed to keep company with a lot of younger women, and in his blog he acknowledged that raised some questions.
"Many have commented that these women were only with me because of my money - a fact that I have to agree with," he wrote.
"I am wealthy and living in a country of extreme poverty," McAfee added. "Parents here 'promote' attractive daughters to men with money constantly ... I am not foolish enough to believe that many young women could love a 67 year man."
Associated Press writer Mark Stevenson reported from Mexico City.
McAfee's blog: http://www.whoismcafee.com/