John Dunsworth was a Canadian actor, best known for playing the alcoholic trailer park supervisor Jim Lahey on the comedy series Trailer Park Boys. Despite seeming completely wasted all the time on the show and during filming, Dunsworth did not drink for / while playing the part. Dunsworth passed away at 71 from a "sudden and unexpected" undisclosed illness. 

Dunsworth has 70 titles for which he is credited as an actor, but he'll always be Retired Officer Jim Lahey, Trailer Park Supervisor of Sunnyvale Trailer Park to me.