Officers were called out to a residence at the 5800 Block of Blue Grama Trail.
Upon arrival, the elderly couple, in their early 80's, suffered injuries from gunshot wounds. The couple was transported to Community Medical Center with unknown injuries.
The man, 84-year-old Louis Marquart, is facing charges of aggravated assault. He remains in the Tom Green County Jail, Monday night.
This is an ongoing investigation.