I was laying on my bed thinking back when I was a child and, sudendly, I remembered "Cancion triste de Hill Street" (what a funny translation! Isn´t it?)
I am sure that you remenber this serie, and what is more, I am pretty sure that you remember this guy:
He had, how can I say?, an odd and uncanny behaviour... He used to grunt and bite criminals!!! His name is Bruce Weitz and, I don´t know if it is your case, but I don´t remember seeing him again in another film, soap opera or whateveryouwant. It seems he has been working in different TV shows, but not as a regular cast, like one episode in Anatomy Grey´s
By the way, when I was looking for information about this guy I found out Frank Furrillo is working in Break Prison. Next time I see it I´ll look for him.