Sheriff's deputies responded to the scene, a residence in the 15000 block of Flinn Road, at about 4 p.m. Saturday after receiving a report of a gunshot victim, said Don McDermott, chief criminal deputy with the Skagit County Sheriff's Office.
A 53-year-old Bow area man was found dead at the scene, he said.
A 46-year-old Sedro Woolley man was later arrested and booked into the Skagit County jail for investigation of second-degree murder.
The identities of the victim and the suspect were not immediately released.
McDermott said the investigation is active and on-going.