Grandpa and Dillenger

My wife's grandfather was, if I recall correctly, 19 years old when Dillenger's body came in to the Cook County Coroner's Office, where he worked at the time. Here he is:
Forgive the quality. As far as I know, this picture was developed from the original film, then scanned my my late father-in-law, may God rest his soul. This photo was in several publications at the time, and was also noticed in a book about Chicago's history my my mother-in-law. Odd story, she picked up the book, opened it to a random page, and said "hey, look, it's grandpa."