That was Fat Sal Mangiavillano, a 400 pound associate who "learnt how to be mechanical" from dicking around with stolen cars from a young age. Apparently in an effort to make his bones he staked out Gravano's workplace and set up a camera to catch his movements. It didn't really go any further then that. His plan to use a car-bomb to take out Gravano was apparently sanctioned by Peter Gotti, who said it was okay since "Sammy broke the rules first".

Once Gravano was arrested for dealing pills in 2000, the plan sorta "died on the vine". Facing bank robbery charges, Fat Sal flipped as well. He testified against first Huck Carbonaro and Peter Gotti, helping put the latter away for good, and linked the Gotti's to the Silwa shootings and Carbonaro to an alleged "threat" towards Jerry Capeci.