Family members cried and hugged each other for support as pallbearers carried the casket of 13-year-old motorcycle racer Peter Lenz from his funeral Friday at St. Joseph Catholic Church in Vancouver.

Lenz was killed Sunday when he fell off his motorcycle and was run over by another rider at the Indianapolis Motor Speedway in a warm-up for a U.S. Grand Prix Racers Union event.

Autopsy results confirmed Lenz died of multiple blunt force trauma. He is the youngest driver or rider to be killed at the 101-year-old speedway.

Lenz earned an "expert" license at age 11 from the American Federation of Motorcyclists, and in March 2009 he became the youngest rider to win an AFM race. This year in the Grand Prix series Lenz had four wins.

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