So what ever happened to Jack McCoy of Law and Order?

Well, I hate to break it to you, Jack McCoy was actually named John James "Jack" McCoy  in the hit TV show Law and Order.

Jack McCoy was played by Sam Waterston and his role took the roles of Executive Assistant District Attorney and District Attorney.

He appeared on the show from 1994-2010.

Sam Waterston has been acting since 1965 and his been in many movie and numerous TV series.

In 1985, he was nominated for an Academy Award for best actor in the movie The Killing Fields.

Since appearing in Law and Order, Waterston has appeared in two movies, Anesthesia and Prohibition as well as three TV series, Jo, The Newsroom plus Grace and Frankie.