Sandra Loree Bienek, 72, and her husband Chester were found dead at their home in Beach City, Texas, on October 18, 2016. Both were shot in the back of the head while they slept; investigators say their grandson, a 14-year-old boy, is the primary suspect and has been charged by the Chambers County Sheriff’s Office with two counts of capital murder.

Police say the boy used the couple’s .45 caliber handgun and then stayed in the house for several days, allegedly impersonating his grandfather when questioned by a school principal whose concern prompted the welfare check. The handgun has not been recovered. The teen remains in custody and has not confessed; legal proceedings are pending, including consideration of whether he should be tried as an adult.

If anyone knew Sandra or the family, or has information about the weapon or the days after October 18, please share what you know with investigators.