A notebook found near Brian Laundrie's remains could answer some key questions, experts say

Many questions remain unanswered following the death of Brian Laundrie. But crime experts say the notebook found near his remains in a Florida nature reserve park may shed some light on the circumstances of his disappearance and the violent death of his fiancee Gabby Petito.

The FBI confirmed Thursday that the remains found in Carlton Reserve in North Port belonged to Laundrie -- who vanished last month after Petito was reported missing. She was found strangled to death in a Wyoming national park on September 19.

Law enforcement also found some of Laundrie's personal items in the reserve, including a backpack, a notebook, a dry bag and some clothing.

Laundrie was not charged in Petito's death, although the FBI on Wednesday had described him as a "person of interest" in her murder.

Experts told CNN that the notebook believed to be Laundrie's could offer some insight into a story that has grabbed public attention.