(Kelso, WA)  --  Police are searching for a gunman accused of shooting and seriously injuring a man in southwestern Washington state.  The Cowlitz County Sheriff's Office says the shooting happened last night at a home in Kelso.  The victim was rushed to a hospital, where's he's being treated for life-threatening injuries.  Police say the suspect is described as a white man standing about five-foot-five with a medium build and frizzy gray hair and facial hair.