Little Al was, like Chiodo, facing a murder contract.
Scarpa was an informant, but never "flipped" per se. (If by "flipped" we mean the whole testimony/debrief/witness protection thing). In any event, his cooperation didn't help him at all.
Not sure if you're talking about D'Arco, Chiodo, or Scarpa but they were all helped immensely by cooperating.
