Tonight on a new Dateline, the latest chapter in this hair-raising tale, featuring new evidence, explosive testimony and the prosecution's new star witness. Watch at 9/8c on NBC. | Dateline NBC

Investigators walked into a mystery that would turn their world upside down… Watch tonight at 9/8c on a 2-hour Dateline Weekend Mystery on NBC. | Dateline NBC

583K views · 7.6K reactions | The mystery of who killed Anita was only just beginning… Her story tonight at 9/8c on an all-new Dateline with Blayne Alexander. | Dateline NBC | Facebook

“I knew she was going to be famous and I would see her on TV.” She was right... Dateline Weekend Mystery tonight at 9/8c on NBC. | Dateline NBC

Friday on an all-new Dateline at 10/9c… | Dateline NBC

19K views · 369 reactions | It was the last good day. All-new 2-hour Dateline this Friday at 9/8c. | Dateline NBC | Facebook

Thirty-two years ago this month, a series of murders began near and along Virginia’s Colonial Parkway. When it was over, four couples were dead at the hand of what authorities believe could be a serial killer. The crimes were dubbed “The Colonial Parkway Murders.” | Dateline NBC