BISMARCK, N.D. (AP) — Volunteers are organizing in North Dakota to finish the harvest work started by a farmer found dead in his wheat field along with three other men in a case investigators describe as a murder-suicide.

The Towner County Sheriff’s Office on Wednesday identified the four found Monday as Douglas Dulmage, 56; Justin Bracken, 34; Richard Bracken, 64, all from Leeds and Robert Bracken, 59, of Cando.

Officials said a .357 caliber revolver at the scene.

Pat Traynor, a close friend of Dulmage said Dulmage owned the property and was shot in his combine while harvesting wheat in his field south of Cando.