Noah Presgroves Autopsy Report ‘Leaves a Lot of Things Up in the Air [Video]

Noah Presgrove’s senior year was filled with all the mile markers leading up to adulthood. The four-sport high school athlete celebrated his wrestling team’s senior night with his parents, went to prom in a suit with an aqua bow tie and cowboy hat and started thinking about his future.

And then, just months after graduation, the Oklahoma teenager’s body was found on the side of Highway 81. He was naked, except for slip-on Hey Dudes, one of which was not even his, according to his family.

A medical examiner’s summary report obtained by PEOPLE said that Noah, 19, died of “multiple blunt force injuries,” but the cause of those injuries remains unknown — and his family is filled with questions about what happened to him.

“It still leaves a lot of things up in the air,” brother Dailen Presgrove says of the autopsy report. “An accident occurred, and we don’t know what that accident is, so the next approach is figuring out how [it] …