Dog the Bounty Hunter has claimed Brian Laundrie, the single person of interest in the killing of his girlfriend, Gabby Petito, could be a “serial killer” due to his ‘dark’ literary tastes.

Dog said he and his crew are now creating a profile of the fugitive they are trying to catch, based on their interests and hobbies.

As he conducts his own search for the 23-year-old fugitive, the 68-year-old reality TV star, whose real name is Duane Chapman, claimed to have unearthed Laundrie’s “demonic past” and his obsession with the “dark side,” he told The Sun.

“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 cited ‘serial killer books’ 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.’ 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 spoke to the Sun.

“He just overnight just didn’t become a killer. A killer is made, and he is built to be or she, a killer,” Chapman added. “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.”

Last August, Laundrie previously boasted of reading a book about a serial murderer and commented on Instagram that he and Petito had read the 2002 horror-satire novel “Lullaby” by Chuck Palahniuk.

“The [expletive] craziest out of all of Chuck’s books on my shelf, I can’t fathom how he must have written this one! I’d love to preach all of the insane twists and turns but all I can say is that I’ll never forget the name Rant Casey. Or Green Taylor Simms,” he shared his thoughts after reading the book.

“Me and my fiancé read this one out loud together and boy oh boy I can’t believe some of the stuff coming out of our mouths,” Laundrie added.

Laundrie shared his thoughts after reading the novel “Lullaby” by Chuck Palahniuk on August 27, 2020 (@bizarre_design_ Instagram)

In Lullaby, published in 2002, tells the story of journalist Carl Streator, who is writing an article about crib death when he notices a weird link between the deaths of babies and the loss of his own wife and infant.

He then discovers that his family had died after he read them a “culling song” from a book. After that Streator unintentionally memorizes the rhyme and goes on to kill people over minor annoyances.

Online sleuths also uncovered a series of chilling posts by Laundrie on his social media pages.

One disturbing image shows a man wearing a wolf mask and wielding a blood-soaked knife.

Another post, titled “Grim Reaper leading sheep to slaughter” posted on July 15, 2020, depicts a flock of sheep surrounded by ghastly creatures carrying scythes.

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