Deputies responded to the home, in the 200 block of Stowell Road in Salkum, Saturday night after receiving a report of a shooting, said Chief Deputy Stacy Brown of the Lewis County Sheriff's Office.
The 56-year-old man who lives at the home told deputies the 28-year-old, later identified as Travis Shive, came onto his front porch "ranting" and accusing him of shooting a neighborhood dog.
The 56-year-old homeowner said he repeatedly told Shive to leave, but he refused and continued to yell at him. The homeowner told deputies he then armed himself with a .380 semi-automatic handgun, as he felt threatened, and went outside again to tell Shive to leave.
Shive then lunged at the homeowner and was shot. He was able to walk off the property before collapsing, Brown said.
Bystanders at the scene initiated CPR until medics arrived. Shive was taken to Providence Centralia Hospital, where he was later pronounced dead.
Detectives continue to talk to the numerous witnesses who saw the incident, and the investigation is ongoing. Detectives are awaiting the results of the autopsy, which will be scheduled later this week, Brown said.
It is still unknown who shot the dog, which is still alive. It is believed that Shive had gone to 56-year-old man's house in error, thinking he was at the house of someone else who had allegedly shot the neighborhood dog.
The 56-year-old homeowner is not in custody and is cooperating with law enforcement, Brown said.