On August 11, 2014, Ryan Callens, 48, was shot and killed inside his Frisco, Texas home. His wife, Maria Callens, 49, was also found dead in the couple’s bedroom. Their 16-year-old son, Zachary Callens, was discovered outside the residence when police arrived and later admitted to his sister and to police that he had killed both parents.

Investigators say a rifle with a flashlight attached by duct tape was used in the shootings. DNA evidence tied Zachary to items recovered at the scene, including the duct tape and the flashlight. Zachary was charged with two counts of murder and certified to stand trial as an adult; prosecutors on the case included Assistant District Attorneys Danette Broome and Cynthia Walker, and Frisco detectives Daniel Bardwell and Sgt. Nelson Walter led the investigation.

Reports indicate the verdict and sentence came after trial. Does anyone have further information about the family or the events leading up to that night?