The man was not immediately identified. He was found Monday morning.
Sgt. Fred Neiman told The Columbian that the man had been shot, but the cause of death was not immediately determined.
Sgt. Kevin Allais said no one had been arrested as of Monday night.
Neiman said detectives believe the victim and whoever shot him probably knew each other in some way. He said there's no reason to think neighbors are at risk.
Nearby residents say they have seen lots of people coming and going at the house, which is reportedly a rental.
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