Robert 'Bob' Berdella, owner of Bob's Bizarre Bazaar in the Westport Flea Market, Kansas City, Missouri was a serial killer dubbed "The Kansas City Butcher" and "The Collector". Kidnapped, tortured, raped and dismembered at least six men between 1984 and 1987.
 
Drawing of a male which resembles Berdella. We are not saying that was what he was drawing, just that this looks like a younger version of him. 
 
Obtained from the Del Dunmire estate in Harrisonville, MO.