College student Anita Knutson was found stabbed to death in her bed in a haunting mystery that would take nearly two decades to be resolved.

The 18-year-old’s shocking death in Minot, North Dakota, and the relentless pursuit by her loved ones to find justice will be explored in an all-new Dateline, airing Friday, May 2 at 9/8c p.m. on .

The episode will explore the shocking death of Staten Island teacher Simeonette Mapes-Crupi, who was found dead in her home on July 5, 2012.

“Beloved Staten Island teacher Simeonette Mapes-Crupi is found dead at the bottom of the stairs in the home she shared with her husband Jonathan,” a synopsis of the episode reads. “An unknown number in her cell phone leads investigators to reveal troubles in her seemingly idyllic life — and to ultimately unearth her killer.”

Dateline correspondent Keith Morrison spoke with Simeonette’s parents, Theresa and John Mapes, and her brother John Mapes III, along with her former students Carmencita Majeed and Von Steven De Valle, for the episode.

The broadcast will also include commentary from former Richard County Assistant District Attorney Wanda DeOliveira, defense attorney Mario Gallucci, and detectives Joe Metsopolous, Michael Burdick and Mike Consenza. 

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