[4] According to the autobiographical section of his book, Elements of a Haunting: Connecting History with Science to Uncover the Greatest Ghost Stories Ever Told, Gatollari's awareness of the paranormal happened after his family moved to a house in New City when he was four years old.

For some reason (it was haunted), no one had wanted to buy it for five years despite the excellent school ratings and size of the home and yard.

"[5] While living in New City, the Gatollari family fell into economic hardship, which they blamed on the spirit energy inhabiting their home.

Mustafa claims that over ten years, he investigated more than 80 locations consisting of private homes, abandoned factories, shopping centers, and "parking garage in Eastern Europe that had been built over a mass gravesite.

[13] Gatollari told Collider, "Like many investigators, Brandon and I have talked about all the things we wish we could see in a paranormal series and now we’re able to make that happen.