San Pedro , Belize ( CNN ) -- A dead neighbor . Headless dogs . And a millionaire on the run . All set against a backdrop of spectacular tropic beauty . It would be difficult to imagine a more intriguing story than the one unfolding in Belize right now . Police there are seeking to question Internet pioneer John McAfee in the killing of his neighbor , American businessman Gregory Faull . Faull , 52 , was found dead with a gunshot wound to the back of the head this month in his home near San Pedro , on the Caribbean island of Ambergris Caye . McAfee , who is not a suspect , has not been seen since . Three people have been detained for questioning in the killing , police have said , and investigators are pursuing multiple leads . CNN was recently granted rare access to McAfee 's beachfront property by a former girlfriend , who asked that her real name not be reported . A bizarre visit to John McAfee 's pleasure palace in Belize . Identifying herself as `` Francesca , '' she said she 'd spoken with McAfee since he disappeared , and that he is `` frightened for his life . '' `` He 's in constant fear , paranoid , '' she said . `` I would say it 's because of what he has been through . ... He thinks people are always after him , which they really are right now . '' The former girlfriend said she does n't know where McAfee is , except that he is not at home . They communicate by phone , `` not often , once a day , or hardly ever , '' she said . On Saturday , McAfee apparently began a personal blog , writing posts about being on the run , the media 's portrayal of him and what he calls `` harassment '' by the Belize government . `` I am asking all people of conscience to read this blog ... and see the ugly truth unfolding here , '' reads one post that names six people he says have been detained by police in the case , including friends and household staff . CNN can not confirm the blog 's authenticity . Francesca pointed out buildings as she walked around McAfee 's compound , a luxurious sprawl of screened rooms , pathways and an open air pool . Police have searched the home and , according to witnesses , dug up the remains of McAfee 's dogs . Faull was killed after four of 11 dogs belonging to McAfee were fatally poisoned , said Wired Magazine Contributing Editor Joshua Davis , who said he had spent more than 100 hours with McAfee in recent months . Faull had frequently complained about the dogs barking , Davis said . Raphael Martinez , a police spokesman , said a person working for McAfee called police about a poisoned dog ; when police arrived at McAfee 's residence , they found the dogs had been buried . McAfee is thought to have shot them to put them out of their misery . Police took just the dogs ' heads , instead of their bodies , witnesses said . Authorities are now awaiting the results of ballistics tests to see whether there is any connection between the bullets in the dogs and the one that killed Faull . McAfee , 67 , told Davis last week that he did not kill his neighbor , the reporter said . McAfee founded the Internet security company that bears his name , but left it in 1994 . He graduated in 1967 with a degree in mathematics from Roanoke College , according to the Virginia school . He went on to found several tech companies and to launch groundbreaking products , including the voice-recognition system Interpath Inc. in 1981 , McAfee in 1988 , and the instant messaging pioneer Tribal Voice in 1996 . When asked why McAfee does n't present himself to police for questioning , his former girlfriend said it is because authorities want to kill him . `` It will never be ended until John is dead . That 's what I believe , until they kill him , '' she said . `` My goodness , '' Martinez said when asked previously about McAfee 's reported fear . `` He needs to come in so that we can clear the air . We are law-abiding people here . We follow the laws to the letter . We believe at this point that he has absolutely no fear of being killed by anybody . ''
NEW : McAfee apparently begins blog , with posts on life on the run . Gregory Faull , an American businessman , was found shot to death on a Belize island . Police want to question his neighbor , Internet pioneer John McAfee , in the killing . His former girlfriend says he is in `` constant fear , paranoid ''