(Hillsboro, OR) -- A man is facing murder charges after stabbing his mom's boyfriend. Police say Thomas Wearing was suffering from a stab wound to the abdomen when they responded to an assault call. He died at a hospital later. Wearing lived with his girlfriend and her 20-year-old son Timothy Simpkins who fought with the man Monday night. Simpkins allegedly stabbed Wearing during the argument and was booked into the Washington County Jail.