Officers responded to a reported medical emergency at a St. Charles residence on the 3100 block of Ridgeview Street shortly before midnight and found a 34-year-old woman with a gunshot wound to the head inside the home. The woman, identified as Crystal Hanshew, was pronounced dead at the scene.
Police said Aaron Guilliams, 31, told detectives he and his wife were arguing, which escalated to violence, and he admitted to shooting his wife. Police recovered a .45-caliber handgun at the scene believed to be the murder weapon.
The couple had been married for about eight months, police said.