Frank "The German" Schweihs. Outfit Hitman.

Francis John Schweihs was a criminal who earned his master’s degree in gangsterism on the mean streets of The Windy City. By 1962, he had been arrested as often as his age, which was thirty-two, for crimes ranging from burglary to homicide.

https://gangstersinc.org/blog/another-chicago-mob-story-the-german-and-the-outfit#google_vignette