Former Broncos WR Demaryius Thomas died from complications of seizure disorder, autopsy says

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Former Denver Broncos receiver Demaryius Thomas' autopsy revealed he died from complications of a seizure disorder.

Thomas was 33 when he died Dec. 9, 2021, just over two weeks before his birthday.

It was revealed that the 10-year NFL veteran had Stage 2 chronic traumatic encephalopathy, a degenerative brain disease, at the time of his death. However, the Fulton County Medical Examiner saw no link between the two diagnoses. 

CTE does not directly cause death.

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The autopsy also showed traces of nicotine and marijuana in his system, but neither were said to play a role in his death.

Thomas began having seizures after a car accident in 2019, and friends and family had noticed a change in his behavior.

Demaryius Thomas of the Denver Broncos celebrates a touchdown during a 2015 AFC divisional playoff game against the Indianapolis Colts at Sports Authority Field at Mile High Jan. 11, 2015, in Denver, Colo.  (Harry How/Getty Images)

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"His mood would change, and he would also isolate himself sometimes," his mother, Katina Stuckey Smith, told ABC News. "Demaryius would tell me, he was like, 'Mom, I don't know what's goin' on with my body. I gotta get myself together.' And he said, 'I don't feel like myself anymore.'"

Thomas was a four-time Pro Bowler, playing in two Super Bowls and winning one. He put up at least 1,000 receiving yards in five straight seasons from 2012-2016.

A tribute logo to late former Denver Broncos receiver Demaryius Thomas at Empower Field At Mile High Dec. 12, 2021, in Denver, Colo. (Justin Edmonds/Getty Images)

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