When Sadie Beacham didn't receive a good night call from her boyfriend, she was alarmed and went to his house to find his screen door wide open. Detectives could not locate his body but DNA evidence pointed to someone Sadie knew well.

At first it seemed like a horrible teenage tragedy when the car with three friends careened into a brick wall at nearly 100 miles an hour, killing two of them. But after a lengthy investigation police charged the young driver MacKenzie Shirilla with murder.