Bjorge and Rider decided to kill Wendy and Randall Bjorge because they had gotten “too strict,” according to Brucz.

On the night of the murder, the pair allegedly waited outside the grandparents’ Lawrenceville home until all the lights had been turned off, Channel 2 reported. Rider began by attacking Randall Bjorge, and Cassandra Bjorge dragged her grandmother into the bedroom, restraining her with duct tape before beating her, Brucz said.

The grandparents were beaten with a tire iron and stabbed before their throats were slit, according to police.

After the grandparents’ bodies were found, Bjorge and Rider engaged in a standoff with Gwinnett County SWAT and attempted to kill themselves before being apprehended.

﻿Learn more about this case:

The Bjorge's family members were inside the court room Friday as the teenage-granddaughter was charged in the case.