Played by Tyler Labine

Jonathan Winant was the Assistant District Attorney who opposed Jeffrey Coho in the Scott Little murder case. Winant had a habit of aggressively demonstrating that he was not intimidated by being something of a 'close-talker'.

Tyler Labine
Tyler Labine is best-known for his role in ABC's sci-fi drama Invasion, but the Canadian-born actor has been appearing on film and TV since the early '90s. One of his more interesting roles was as John Belushi in the 2005 made-for-teleision movie Behind the Camera: The Unauthorized Story of Mork & Mindy. That film also included former Boston Legal guest-star Daniel Roebuck playing the role of Garry Marshall.

Tyler Labine at the Internet Movie Database.

Episode appearances:
3x02 [New Kids On The Block]
3x03 [Desperately Seeking Shirley]
3x05 [Whose God Is It Anyway?]
3x06 [The Verdict]