good evening. we begin tonight with the autopsy report late today revealing the cause of death in the gabby petito case. the cause of death, strangulation. saying she died somewhere between three and four weeks before her body was found. she was on a cross-country trip with her boyfriend, brian laundrie. they had been documenting the journey themselves. a reporter asking, did brian laundrie kill gabby petito, the coroner saying, that's a question for the fbi. here's victor oquendo. >> reporter: tonight, one month and one day since gabby petito was first reported missing by her family, the coroner in teton county, wyoming, where her body was found, announcing she was strangled. >> we find the cause and manner to be cause, death by