Back in 1980, Dr. Steven Pollock was found dead in his San Antonio home, shot through the head.

He was a physician and something of a magic mushroom kingpin. Pollock did pioneering research on the therapeutic uses of psychedelic mushrooms, and grew and sold mushrooms in massive quantities.

His murder remains unsolved, but conspiracy theories abound involve everyone from local pimps to the federal government. Writer Hamilton Morris delves into the case in a new article in the current issue of Harper's Magazine, and joins the show today to talk about what he found.