The story of David Petillo traveling around and killing people while dressed as a woman for his disguise never struck me as realistic. I think there are many who none of us will not know the names of that are or were more dangerous than the ones we know of.
Idk it doesn't seem too outlandish to me. He was considered a pretty small guy even back then so why not toss on a dress before you kill a guy. The target is more likely to have their guard down and any witnesses will have an incorrect description to give the cops.
