MILWAUKEE (WXOW) -- The family of a former Marine sergeant who took his own life at Yellowstone National Park in Wyoming says his death is a result of post-traumatic stress disorder (PTSD).
The family of Peter Kastner lives in Chippewa Falls and his father, Larry, said Wednesday his son suffered from the psychological disorder after his discharge from the Marines in 2007.
Kastner says his son's life fell apart because of PTSD. Kastner and his wife, Sara, had not heard from Peter since April. They knew he was living in Oklahoma but received word in late May that their son had rented a car, which was found abandoned along a trail at Yellowstone.
Researchers found the body of the 25-year-old former Marine July 14. They were working at Garnet Hill, a summit north of Tower Junction.
According to a study done in 2009 by the RAND Corp., roughly 20 percent of returning veterans show symptoms of PTSD or major depression.
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