It has been some time but I think it's from "Hells Angels' I learned Ken Kesey, author of One Flew Over the Cuckoo's Nest, participated in MKUltra while working

It has been some time but I think it's from "Hells Angels' I learned Ken Kesey, author of One Flew Over the Cuckoo's Nest, participated in MKUltra while working as a student at Menlo Park Veteran's Hospital and the character Chief was inspired by his own hallucinations. Hunter S. Thompson partied with the Hells Angels at Ken Kesey's house with the Merry Pranksters. There's a lot to unpack there.