The Federal Bureau of Investigation on Friday provided what it said would be the last update on the Gabrielle Petito case, saying fiancé Brian Laundrie claimed responsibility for her death.

The agency also released a timeline of the case, including that Laundrie wrote in a notebook that he claimed responsibility.

The FBI found Gabby Petito's remains in September at a campsite in Wyoming after she had been reported missing. It was determined that she had been strangled.

Laundrie drove back to Florida alone and did not report her disappearance to authorities, leading some to speculate his involvement in her disappearance. Laundrie was found dead at Myakkahatchee Creek Park the following month.

In a news release, the FBI released a timeline that said in part, "A review of (a) notebook revealed written statements by Mr. Laundrie claiming responsibility for Ms. Petito’s death."

“All logical investigative steps have been concluded in this case,” said FBI Denver Division Special Agent in Charge Michael Schneider.

“The investigation did not identify any other individuals other than Brian Laundrie directly involved in the tragic death of Gabby Petito. The FBI’s primary focus throughout the investigation was to bring justice to Gabby and her family. The public’s role in helping us in this endeavor was invaluable as the investigation was covered in the media around the world."

The FBI opened its investigation into Petito's disappearance on Sept. 12.

On Sept. 19, the search team located the remains of Petito at the Spread Creek Dispersed Camping Area near where she and Laundrie had been seen together.

The Teton County Coroner’s Office subsequently concluded Petito died of “blunt-force injuries to the head and neck, with manual strangulation.”

The FBI also released a timeline. Here it is from their news release.

• The FBI investigation revealed that, between August 30 and September 1, 2021, Mr. Laundrie had used Ms. Petito’s debit card without authorization on his drive back to Florida from Wyoming.
• After Ms. Petito’s death, there were several text messages identified between Mr. Laundrie’s telephone and Ms. Petito’s telephone. The timing and content of these messages are indicative of Mr. Laundrie attempting to deceive law enforcement by giving the impression that Ms. Petito was still alive.
• On September 15, 2021, Mr. Laundrie’s Ford Mustang was recovered from the T. Mabry Carlton Jr. Memorial Reserve and Myakkahatchee Creek Park in North Port, Florida.
• On September 17, 2021, Mr. Laundrie’s parents reported him missing shortly after law enforcement conducted a welfare check at their residence.
• On September 18, 2021, law enforcement officials commenced an extensive search of the park where Mr. Laundrie’s vehicle was parked and did not locate Mr. Laundrie. The area where Mr. Laundrie’s remains were later found was part of this search area, but the area was submerged due to recent flooding at the time of this initial search.
• On September 22, 2021, the U.S. District Court for the District of Wyoming issued a federal arrest warrant for Mr. Laundrie. The warrant was issued pursuant to a Federal Grand Jury indictment for violation of federal statute 18 U.S.C. § 1029(a)(1): “Use of Unauthorized Access Devices” related to Mr. Laundrie’s activities following the death of Ms. Petito.
• On October 7, 2021, after law enforcement made a request through Laundrie family attorney Steven Bertolino, the Laundries provided personal effects to law enforcement which were to be used to assist in the search of the Myakkahatchee Creek Environmental Park.
• On October 20, 2021, after water had receded from the area and the park was reopened, Mr. Bertolino notified law enforcement that Mr. Laundrie’s parents intended to return to the park to search for Mr. Laundrie. Law enforcement officers were present when Mr. Laundrie’s parents located an item in the park later determined to belong to Mr. Laundrie.
• Upon further search of the area, investigators found human remains later confirmed to be Mr. Laundrie, along with a backpack, notebook, and a revolver. A review of the notebook revealed written statements by Mr. Laundrie claiming responsibility for Ms. Petito’s death.
• On November 23, 2021, the District 12 Medical Examiner’s Office in Sarasota, Florida, released its report on the manner and cause of death of Mr. Laundrie. The report concluded Mr. Laundrie died of a self-inflicted gunshot wound.

Families React

Attorneys for both families released statements following the FBI's final update in the case.

STATEMENT FROM PETITO FAMILY ATTORNEY:

"Gabby's family would like to thank the Federal Bureau of Investigation, specifically the Wyoming, Denver, New York and Tampa offices, all of their task force members and their assisting agencies.

Gabby's family would like to thank the FBI's Victim Services Department for all they have done for them. Victim Services has been there for support from the earliest stages of this investigation and helped their entire family navigate through the worst moments of their lives.

We truly appreciate the FBI's diligent and painstaking efforts in this extremely complicated case. The quality and quantity of the facts and information collected by the FBI leave no doubt the Brian Laundrie murdered Gabby."

STATEMENT FROM LAUNDRIE FAMILY ATTORNEY:

"Gabby and Brian are no longer with their families and this tragedy has caused enormous emotional pain and suffering to all who loved either or both of them. We can only hope that with today’s closure of the case each family can begin to heal and move forward and find peace in and with the memories of their children.

May Gabby and Brian both rest in peace."