​From Wikipedia, the free encyclopedia.   David Rees Snell (born August 20, 1966) is a television actor cast as Detective Ronnie Gardocki, on the FX Networks' crime drama The Shield. When The Shield was picked up by FX, Snell was initially hired as a supporting cast member on the show. He was told, that the writers had no plans for developing his character, due to him only being a last minute addition to an already large cast of actors. However, after merely a few episodes, his character was m ...