The civilian suspect is the estranged wife of a former Fort Hood Soldier and is currently in custody in the Bell County Jail awaiting charges by civilian authorities, according to military officials.
Guillen, 20, has been missing since April. She was last seen in the parking lot of her barracks at the post on April 22.
On Tuesday, investigators had “returned to an area of interest close to the Leon River, Bell County, Texas, for more investigative work” and discovered partial human remains, the Army CID said.