Sgt. Tierney, played by Ronn Carroll, is a character featured in the 1980 film Friday the 13th.
Tierney drives Steve Christy back to Camp Crystal Lake after Christy's jeep goes off the road during a powerful thunderstorm. He is later seen at the end of the film in Alice Hardy's hospital room. He is confused by her mention of a boy who dragged her into the lake. He tells her they never found any boy.