Heroin in north philly and camden are normally brought in one fashion or another by the cartels.

And while Ligambi isn't directly involoved in Drugs, one of his top aids was in Massimino so it was done under is nose during his reign. And if you read the whole indictment you will notice that Dame was made around by Joe and then went off to Jail on Drug charges right after that. So he was dealing drugs as a made man under ligambi.