If you were a gangster...
Would you want Frank Sheeran on your side? I mean, at what point does loyalty become betrayal? He could have at least declined to do the final deed himself, and simply told Russ that it was too much of a burden.
shareIf he didn't do it himself, he (and his family) would be next - or at least that's what was implied by Pesci character.
shareI guess implied leaves it open to interpretation, and I get the implication, but...
Russ (to Frank while they were having breakfast the morning of): "Frank, I had to put you into this or you would have never let it happen"....."You and Irene are going to be ok, cos you're with me....cos you're with me"
Frank was in the clear, regardless. I think Russ just wanted someone thorough to do the job. He could, and should, have declined if he was truly loyal. My take.