David Rees Snell, born August 20, 1966 in Wichita, Kansas, USA, is an actor. He plays SEAL Hopper in Last Resort. He guest stars in the first season episode "Captain". He also appeared in Last Resort show runner Shawn Ryan's earlier series The Shield, Lie To Me, and The Unit. He starred in The Shield as Detective Ronnie Gardocki. He had a guest role in Lie To Me as Kevin Wilkie in the episode "Pied Piper". He had a recurring role in The Unit as antagonist Leon Drake. He has been active since 1993 and has also appeared in the series Sons of Anarchy, the game Call of Duty 2, and the films Ride With The Devil (1999), P.1 (1999), and The Beacon (2009). He had a recurring role in Sons of Anarchy as FBI Agent Grad Nicholas.