SIOUX FALLS, S.D. (KELO) — An Ellsworth Air Force base airman has pleaded not guilty ... Quinterius Charles Chappelle, 24, is charged with killing Sahela Toka Win Sangrait, 21.

A South Dakota airman accused of killing a Native American woman at Ellsworth Air Force Base has now been charged with first-degree murder and could face the death penalty if convicted.

An Ellsworth Airman charged with first degree murder has been denied pre-trial release. Quinterius Charles Chappelle, 24, appeared in federal court on Friday for his arraignment and detention hearing.