TAMPA, Fla. (WFLA) — The parents of Brian Laundrie are looking to reclaim a notebook related to the FBI investigation into their son’s death, according to statements made by their attorney, Steven Bertolino. He said they want to take the book back as part of their formal proceeding to control his estate.

Laundrie was the sole person of interest in his fianceé Gabby Petito’s death but died of a self-inflicted gunshot while on a hike in the Myakkahatchee Creek Environmental Park in mid-September, according to the medical examiner in Sarasota County, Florida.

Bertolino said he is also working with Petito’s family to help return objects belonging to her. “Nichole Schmidt filed to obtain Gabby’s belongings that are in the Laundrie home or in police custody,” he said. “Rick Stafford [the Petito family attorney] and I are trying to work this out cordially.”

The FBI took the notebook into its possession during their search for the late 23-year-old of the Carlton Reserve. The notebook and items were found close to skeletal remains that were later confirmed to be Laundrie. His family filed a request in December to gain access to their son’s estate as beneficiaries.

According to Bertolino, the notebook would be “returned to its owner” once the FBI closes the case.

Laundrie left no will behind at the time of his death. Laundrie’s estate is estimated to be around $20,000 in Bank of America accounts. If his parents become beneficiaries, they would receive half of the value of those accounts.