DiBernardo was unlucky, on the one hand a boss (Gotti) greedy and arrogant, there was no reason to kill him because was a good earner and was a capo without a crew behind and certainly was not a danger to anyone;could say that ruggiero did not want to give him $ 250,000, Gravano would gain from his death and Gotti had no reason for don't gave the ok.

http://en.wikipedia.org/wiki/Reuben_Sturman

Reuben Sturman (1924– October 27, 1997) was an American pornographer and a legend in the porno golden era.