John Fiore is an actor and producer, known for Meet the Mobsters (2005), Patriots Day (2016) and Person of Interest (2011). He was born in Boston, Massachusetts. He most recently played Chief Arena in the highly acclaimed Chappaquiddick. He is best known for his work as Gigi Cestone on HBO's Sopranos, Det Profacci on Law and Order, Alphonse Nozzoli on Showtime's Brotherhood and Vinnie Salerno on Guiding Light.