Domenico Mazza was a Italian mobster and the capo of the powerful Barzini Family. Mazza was a very good friend to the Barzini family, being considered a part of the immediate family, and was best friend with Victor Barzini and Sergio Turrera. In 2011, he was killed by an explosive car, and at his funeral, Victor was captured. He was also known too be very paranoid. He also had his own crew.