An investigation into a fatal heroin overdose lead to the arrest of an alleged drug dealer, Nassau police say.

According to police, Narcotics/Vice Squad detectives were investigating a fatal overdose that happened Monday night in Massapequa. Police say the investigation led to the arrest of Anthony Legette, 28, of Scherger Avenue, East Patchogue, on Aug. 21 in Farmingdale.

Police say that Legette was directly linked to the overdose. The heroin contained fentanyl, police say.