Here is a short 4-page tale from May 1952's Spellbound #3 which was published by Marvel Comics (back when they operated under the Atlas Comics banner). The Grand Comics Database lists the writer as Hank Chapman, but they do not identify the artist.
Steve Banes sent this story to me last summer as a perk, so let me offer my belated thanks to him for the courtesy; although I've added that issues cover to the mix.
"The Flat Man" relates the experience of a small time hood who lets things unfortunately get away from him and thus pays the ultimate price. Enjoy!