. >> reporter: greg's mother eileen keeney says her son wanted a peaceful retirement in the caribbeant when she came to visit him a few months later, she says it was anything but peaceful. >> greg was not happy with him, and he had had some issues with mcafee. >> reporter: keeney says greg was disgusted by what mcafee had brought back from the jungle. that harem of women, the armed guards, and especially the swarm of dogs that constantly menaced passersby. >> he said, now, we're going to be walking past mcafee's house and there's going to be dogs there. now, they're usually fenced up, but he says i just want to warn you. >> reporter: as keeney headed home to florida, she had no clue what was ahead. two days later, she received an unfathomable phone call from her daughter. >> and then she told me greg's been murdered, and i let out this blood-curdling scream. >> reporter: a brutal beachside murder. was the eccentric millionaire involved? i have a couple more questions. coming up, when we press him, we discover that is a touchy subject. >> nothing happened. good-bye. >> reporter: you're