A 15-year-old Wallula boy found dead in his home Monday died from natural causes, officials said.
Zachary Davis Morrison was a sophomore at Columbia (Burbank) High School.
An autopsy completed Tuesday showed Morrison suffered from a heart condition, said Walla Walla County Coroner Richard Greenwood.
The autopsy was done by Dr. Jeffrey Reynolds, a forensic pathologist from Yakima.
Morrison's parents are Tamatha and Kenneth Wright. He was the youngest of 10 children.
He played on the high school football team this fall as a wide receiver and free safety. He was also on the track team.