The parents of Tyler Hilinski say an autopsy following his January suicide showed evidence of chronic traumatic encephalopathy in his brain.
Tyler was quarterback of Washington State and committed suicide by gunshot on Jan. 16.
"Did football kill Tyler? I don't think so," Kym Hilinski said in a Sports Illustrated documentary about Tyler's life. "Did he get CTE from [playing] football? Probably. Was that the only thing that contributed to his death? I don't know."
Mark Hilinski told "Today" that the medical examiner determined Tyler "had the brain of a 65-year-old, which is really hard to take."
Mark and Kym Hilinski have spoken to their younger son, Ryan, a high school quarterback committed to play at South Carolina in 2019, about the results of Tyler's autopsy. Ryan Hilinski told Sports Illustrated that while the information "scared me a little bit," he intends to continue playing.