The body of Sgt. Paul Stuckey was found at about 7 a.m. Friday next to his patrol truck by fishermen just outside St. Francisville in West Feliciana Parish.
Investigators say he was last heard from at 2:15 a.m. when he called into a Wildlife and Fisheries Department dispatcher that he was about to look into a nighttime hunting complaint.
Adam Einck, a department spokesman, says investigators are treating his death as a homicide. He says it's common for wildlife agents to work alone.
Stuckey was an 18-year department veteran and had a wife and three children.