>> so you are not the monster of florence? >> you asked him outright? >> i asked him directly. i asked him, mario, i'm sorry. i can't let you do this scoop. >> i can't let you do this scoop. >> then he said something very vulgar in italian. >> the gist of it being what? >> the gist of it, i like my women living when i have sex with them. >> then the writers got up to leave. >> he said, ah, spezi, i forgot something. >> i never joke. >> and i never kid around. >> what did you take that to mean? >> well, it was a threat. in italian it's even more of a threat than it is in english. >> as you left his home after speaking to him, what did you think? >> well, me and doug, we were silent. we entered our car, and then almost at the same time, we say, it's him. >> if it was him, if carlo was the monster, it was a stunning moment. and it would make a great ending to their book on the monster case.