Michael K. Williams' drug dealer pleads guilty to fatal overdose.

Irvin Cartagena, a member of a drug trafficking organization, pleaded guilty to one count of narcotics conspiracy resulting in death for selling drugs that led to the overdose and death of actor Michael K. Williams. Williams had taken heroin laced with fentanyl, which he purchased from Cartagena. Cartagena was known to sell drugs with various logos, including Gatorade, IKEA, and AAA Insurance. Williams, known for his role as Omar Little on The Wire, was open about his struggles with drug addiction.