Persico believed that Aronwald, who had helped prosecute Persico, had been disrespectful to the Cosa Nostra. Killing a prosecutor was normally forbidden in Cosa Nostra tradition, but Persico wanted him murdered anyway. Cacace arranged for brothers Vincent and Eddie Carnini to murder Aronwald.
Persico felt that Aronwald, who had worked against him in court, had been disrespectful to the Mafia.  Despite the usual prohibition on killing prosecutors within their organization, Persico ordered his murder. Cacace enlisted brothers Vincent and Eddie Carnini to carry out the assassination.