I might be repeating myself, but I still think crooked cops are the best hitmen because it takes a lot of effort to prove they were the killers and not on duty even if caught near the crime scene, and other cops are reluctant to testify against them, the police has its "omerta'" too in many cases.

Willie Marfeo to Henry Tameleo:

1) "You people want a loaf of bread and you throw the crumbs back. Well, fuck you. I ain't closing down."

2) "Get out of here, old man. Go tell Raymond to go shit in his hat. We're not giving you anything."