Brian Laundrie, the sole suspect in the homicide of his girlfriend Gabby Petito, died from a gunshot wound to his head, his family's lawyer has revealed.
Laundrie's remains were found in a nature reserve near his Florida home weeks after vanishing on September 13.
Authorities are not seeking anyone in connection to his death.
After an autopsy from Sarasota County medical examiner proved inconclusive, his cause of death was concluded by an anthropologist, ABC7 reported.
Lawyer Steve Bertolino said in a statement there was now hope "the findings brings closure to both families".
In a statement released by a family friend to The Independent, Ms Petito's family said they are "aware of the circumstances" surrounding Laundrie's death.
Ms Petito's body was discovered in the Grand Teton National Park in Wyoming on September 19, nearly three weeks after Laundrie returned home alone. The couple had been travelling the US in a van, documenting their trip on social media.
An autopsy ruled Ms Petito, 22, died from strangulation.
Her disappearance and death, and the resulting FBI-led search for Laundrie, 23, prompted widespread international interest in the case.
Mr Laundrie's skeletal remains were identified on October 22 using dental records after his remains had been submerged in a marsh for weeks.
“We are thankful that another step in finalising this case has been taken,” North Port Police Chief Todd Garrison said in statement.
”While this entire situation evokes nothing but sadness, we’re hopeful that all the work which went into the chaotic search for answers will help heal those impacted.”
Laundrie remains the only person of interest in the homicide of Ms Petito. He was previously charged with the unauthorised use of Ms Petito's credit card.
Ms Petito's family believe Laundrie was sending fake messages via her phone to cover up her death.
Do you have a story tip? Email: firstname.lastname@example.org.