Might a 35-year-old cold case involving the murders of four people finally be close to being solved?
That’s the hope of Sheila Sharp, who discovered the bodies of her mother, brother and a friend at her family’s cabin in Keddie, California, in 1981, in a mystery re-examined this past Monday in an episode of PEOPLE’s true-crime series, People Magazine Investigates, on Investigation Discovery.
The remains of the fourth victim, Sheila’s sister, who vanished from the family’s home that night, were found three years later.
Now, in the People Magazine Investigates After Show, Sheila shares her reaction upon learning that a reopened investigation has yielded new clues.
• Watch the People Magazine Investigates After Show, available now on the new People/Entertainment Weekly Network (PEN). Go to PEOPLE.com/PEN, or download the PEN app on Apple TV, Roku Players, Amazon Fire TV, Xumo, Chromecast, iOS and