If you want definitive proof, then you better not believe 90% of what is said on this forum because no one has the proof or facts unless you happen to be there yourself.
It is only logic that a person like Johnny Plescio issues threats to two sons of a notorious crime family, orders the murders of Paolo Cotroni and then this person Johnny Plescio just happens to get killed two weeks after Paolo Cotroni gets killed.
Yep it must be coincidence !