The University of Turin has a Museum of Criminal Anthropology that features collections related to the famous turn-of-the-century thinker Cesare Lombroso. Lombroso was particularly well-known for his work on the physical defects that were putatively associated with the criminal type.
If you go to the museum’s website, you can take a virtual tour (click on “la visita virtuale” and then “uno sguardo…”). There are photographs of a number of unusual artifacts having to with Lombroso and crime during his era, including knives hidden in crucifixes.
Thanks for Renato Foschi for alerting me to this site.