Brian Laundrie claimed responsibility for Gabby Petito's death

[Spartan]

efore taking his own life, Brian Laundrie wrote in a notebook he was responsible for Gabby Petito's death, according to the FBI.

"A review of the notebook revealed written statements by Mr. Laundrie claiming responsibility for Ms. Petito's death," the FBI's Denver Field Office said in a statement released Friday.

The notebook was discovered in October, in the same area as Laundrie's remains, in Florida's Myakkahatchee Creek Environmental Park, authorities said. A revolver was found nearby, the FBI stated.

Petito's and Laundrie's families have reached an agreement on how the couple's belongings, including a notebook, will be distributed, Laundrie family attorney Steve Bertolino said Friday, about four months after Petito's remains were found in Wyoming.