LITTLETON, Colo. — Quinton Sanford never let self-doubt hold him back.

He planned to attend the Air Force Academy and act in a movie alongside Will Smith. He was a member of the Highlands Ranch High School wrestling and cross country teams. Although he was neither the fastest runner nor the strongest wrestler, he didn’t let that trouble him. He did it all while living with autism.

Sanford, a 15-year-old sophomore, died Wednesday after collapsing during a run with the cross country team.

An autopsy was inconclusive about cause of death. Additional test results are expected in seven to nine weeks.

On Monday, hundreds of his high school peers were among the mourners at Pax Christi Catholic Church for his funeral. It was a poignant display of how a young man with a heart bigger than his disability had become one of the school’s most beloved students.

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