Oak Park, Illinois - Thursday, July 7, 2016
Please note: He prefers to go by Bill, though he is known as William J. Martin in his work and writings.
Bill Martin, a former Assistant State's Attorney and the Chief Prosecutor of mass murderer Richard Speck, poses for a portrait in his office in Oak Park, Illinois, on Thursday, July 7, 2016. Martin is holding the book The Crime of the Century, which he co-authored with journalist Dennis L. Breo.
Photo by Alyssa Schukar for NPR