PROVIDENCE — A Central Falls man faces six years in prison after he pleaded guilty to charges of trafficking fentanyl from his apartment and being a felon in possession of a firearm, according to the U.S. Attorney's Office in Providence.Dennis Rivera, 31, pleaded guilty to possession with the intent to distribute fentanyl, possession of a firearm in furtherance of a drug-trafficking crime, and two counts of possession of a firearm after having been convicted of a crime [...]