>Didn't the father kill him and profit off the death with a long-running TV show?
Yes to the TV show. Unclear about who killed Adam.
https://en.wikipedia.org/wiki/John_Walsh_(television_host)
>John Edward Walsh Jr. (born December 26, 1945) is an American television personality, and victim rights advocate, and the host/creator[1] of America's Most Wanted. He is known for his anti-crime activism, with which he became involved following the murder of his son, Adam, in 1981; in 2008, the late serial killer Ottis Toole was officially named as Adam's killer.[2] Walsh was part-owner of the now defunct National Museum of Crime and Punishment in Washington, D.C. He also anchors an investigative documentary series, The Hunt with John Walsh, which debuted on CNN in 2014.