So apparently it wasn't for lack of trying. Reading your original comment Furio I got the impression that they didn't even try.
The point is that when Buffalo family was more powerful,the blacks that killed bifulco nephew would be whacked by the wiseguys not offering a bounty on his heads. But in the 1990s the Buffalo mob was so weak that dont had the force to start a war against the gang.In the 1950s Bifulco would order to his crew to find and kill the blacks,whatever would happen.
