Teens admit to killing grandparents and partying afterward

Cassie Bjorge and Johnny Rider had been planning the murders of her grandparents for days

(CNN) – Investigators say the two Gwinnett county teens partied in the grandparents’ house, days after killing the couple in an ambush.

Police say Cassie Bjorge and her boyfriend planned the murders of her grandparents for days… And thought out details like putting caulking the doors shut in the house, apparently to try and keep the odor of death from being detected outside.

Dave Brucz, a Gwinnett County detective, said, “Cassie gave a detailed confession of what happened.”

Brucz said Cassie Bjorge and Johnny Rider had been planning the murders of her grandparents for days. They waited outside the couples Furlong Run home for the lights to go out, then snuck into the couple’s bedrooms.

Brucz said, “Johnny began to attack the grandfather, Cassie then said she had a surge of energy, she then dragged her grandmother into her grandfather’s bedroom, she was duct taped.

Investigators say the teens then beat the grandparents, Randall and Wendy Bjorge, before slicing their throats and leaving them for dead.

Brucz said, “They did hang out at the residence and smoke marijuana for a few days.”

Reportedly, Bjorge and Rider invited friends over to party during that week, friends who had no idea what had happened upstairs. The teens were arrested April 9th after they allegedly attacked Rider’s sister and her boyfriend with baseball bats.

Investigators say the teens did their best to hide their crimes, not only caulking the doors of the house, but also pretending to family that the grandparents were still alive.

Brucz added, “She admitted after murder she was texting family members because they were worried about them, and she was pretending to be Wendy.”

Police said Cassie believed her grandparents had become too strict. Investigators believe the grandparents weren’t their only intended victims.