RAPID CITY, S.D. (AP) — The U.S. Air Force has released the name of an airman stationed at Ellsworth Air Force Base who was found dead at an off-base residence.

The Air Force says 24-year-old Senior Airman William Horton was a B-1 Journeyman with the 28th Aircraft Maintenance Squadron.

Horton was an active duty airman assigned to the 28th Bomb Wing. He was found dead Monday at an off-base residence.

Col. David Doss, 28th Bomb Wing commander, calls Horton’s death “a tragic loss for the entire Raider family.”

The Air Force says the death remains under investigation.