A man charged with capital murder in the fatal shooting of a family of six children and two parents at their Houston home is set to make his first court appearance.

David Conley, who authorities say was previously in a contentious relationship with the mother, is due in Harris County court Monday. The 48-year-old Conley, who has a violent criminal history, is being held in jail without bond. He doesn't yet have an attorney.

The dead were identified as 40-year-old Valerie Jackson and her husband, 50-year-old Dewayne Jackson. The children killed include a 13-year-old believed to be Conley's son from his relationship with Valerie Jackson.

Authorities responded to the home Saturday after relatives requested a welfare check. They say after an hours-long standoff with Conley ended, they found all eight victims shot in the head.