No he did not...Kuklinski never killed for the mafia, he stayed away from them after DeMeo slapped him around. Real LCN guys from that time period find the idea laughable that he was a mafia hitman. Look at the list of people Iceman was convicted of killing...notice there are no Italian surnames? Funny for a mafia hit man...Carlo paid $10k to Kuklinski for his story, and I have heard people on the inside speculate Carlo just told him to sit back and let him make up his story for him.