The initial autopsy of Brian Laundrie's remains did not uncover a cause of his death, though a more intensive examination will be done, a Laundrie family lawyer said Monday. The inconclusive results came on the same day Florida police admitted that officers mistook Brian Laundrie for his mother during the week he disappeared from his family's home, the Herald-Tribune reports. Laundrie's remains were found last week in a Florida wilderness park after a month-long search. He was the sole person of interest in the murder of his former fiancé Gabby Petito after the pair went on a cross-country road trip to national parks. Petito's body was found on September 19th near a campground in Wyoming.