Dog the Bounty Hunter claims Brian Laundrie could be a 'serial killer, not just a killer of Gabby' | Daily Mail Online Dog the Bounty Hunter claimed Brian Laundrie could be a 'serial killer' because of his 'dark' choice of literature which is '10 times worse than 'Dungeon and Dragons.' Dog, who was convicted of murder back in 1976, speculated that the sole person of interest in the homicide of Gabby Petito could have killed in the past, saying he is 'not just a killer of Gabby'. The 68-year-old reality TV star, real name Duane Chapman, told The Sun people don't just become killers 'overnight' as he continues to embark on his own search for the 23-year-old fugitive. 'I'm thinking more and more about him being maybe a serial killer — not just a killer of Gabby. The books he reads are unbelievable,' he said. Dog pointed to the 'serial killer books' Laundrie was reading as a sign of his 'demonic past.' 'A couple of the books that he's been reading are 10 times worse than 'Dungeon and Dragons',' he said. 'This kid, Brian, has taken those books obviously to heart. And this is what happens when your kid is looking at those kinds of things. 'He built himself to be that by looking at that kind of, let's say the dark side stuff. There are pictures of demons all over it.' He added: 'I hope the jury that sentences him doesn't get to see what he's like.' Dog, who was sentenced to five years in prison in 1976 for the botched drug deal where his accomplice shot a man dead, said killers are 'made'. 'He just overnight just didn't become a killer. A killer is made, and he is built to be or she, a killer,' he said.