An 89-year-old man who shot his wife multiple times from close range while she was sleeping in a recliner chair at their Fairfax County, Virginia, home, killing her, pleaded guilty Monday to manslaughter and weapons charges.

Douglas Sommer faces a total of 15 years in prison in the killing of Marilyn Sommer, who was 87 at the time of her death in February. He pleaded guilty to voluntary manslaughter and unlawful discharge of a firearm and is scheduled for sentencing Jan. 9.

According to Fairfax County Commonwealth’s Attorney Steve Descano, Douglas took his .32 caliber Herstal 1922 pistol and went into the den of his home on Pennypacker Lane, where Marilyn was sleeping in the recliner. He pointed the gun at her and pulled the trigger five times, striking her several times in her head and chest, Descano’s office said in a news release.

When first responders arrived, prosecutors said, Douglas calmly stated he killed his wife. Their daughter, who was at the family home to help her parents move into an assisted living facility, later told police her father did not want to move.

“Marilyn Sommer’s long life ended in her own home, at the hands of her own husband,” Descano said in a news release. “This is a tragic outcome for the whole Sommer family.”