02.04.1949 - 14.08.2012 (63 years) (New Haven, Connecticut, USA)
Ronald Gabriel Palillo (April 2, 1949 – August 14, 2012) was an American actor and teacher. He was best known for his role as the endearingly dim-witted character Arnold Horshack on the ABC sitcom Welcome Back, Kotter (1975–1979).