A Mississippi man who is thought to have been the first person to ever be diagnosed with autism has died at 89-years-old.
Donald Triplett, from Forest, Mississippi, was confirmed to have died on Thursday, June 15. An obituary for him said he died "peacefully at home" following an "extended illness".
Donald, born September 1933, was featured in articles, books, a documentary and medical journals throughout his life after he was recognised as the first person diagnosed with autism spectrum disorder.