I don't trust Henry Hill's account of anything. He his the one and only source for the killing. I think they may killed a person, probably a guy in the drug rackets over a dumb bar fight, but I don't think it was anyone made, or that DeSimone was tricked into thinking he was going to get made in order to kill him. I wonder if Henry Hill's book version of events (Which differ from the movie) are in his original briefings from when he began to rat? In the book I think DeSimone killed the so-called Billy Bats 2 weeks after the "shine box" argument in a different bar.