Dateline: Secrets of the Sliding Door - Everything we know about NBC's upcoming true crime episode

NBC Dateline's upcoming true crime story tells a tale of dark secrets and the tragic death of Simeonette Mapes-Crupi in July 2012. The episode titled 'Secrets of the Sliding Door' reported by Correspondent Keith Morrison will air this Sunday, May 4, 2025, at 10/9c.

After a 911 call from her husband, this beloved Staten Island teacher was found dead in the home that they shared. As the police begin investigating the murder, chilling facts about her life come to light.

Here's everything we know about the upcoming bone-chilling Dateline episode.

Secrets of the Sliding Door: Everything we know about the upcoming Dateline episode

In the upcoming Dateline episode, set to air on May 4, Correspondent Keith Morrison will be reporting on a deeply troubling case involving the death of Simeonette Mapes-Crupi. The official synopsis of the episode reads:

"A beloved Staten Island teacher is found dead in the home she shared with her husband; an unknown number in her cell phone leads investigators to reveal troubles in her seemingly idylliclife -- and to ultimately unearth her killer."

Jonathan Crupi, husband to Simeonette, called 911 on July 5, 2012, reporting a homicide, claiming that he came home to find his wife dead. As the police start investigating her death, they find out that she was lying "face down in a pool of blood" after being pushed down a flight of stairs, and then violently stabbed 15 times.

Dateline reports that the detectives find the home that they shared completely ransacked, and a sliding door in the back that was left open, without a single sign of forced entry. Was it a deadly intruder who violently murdered the Staten Island teacher? Or are there even more haunting details in the case that were being hidden? As the investigations further, the detectives discover bone-chilling facts about the husband and when he made the 911 call.

As per Dateline, the husband appeared to be numb, and as the law enforcement starts digging deep into her life, they find out that secrets aren't that easily kept these days. The episode will feature information about the use of a sex worker named 'Miss Pumpkin' and how a series of incriminating evidence left behind and 'Miss Pumpkin' wanting to avoid any trouble from reaching here, that finally led to the real culprit being discovered.

Morrison will be reporting on everything the detectives found out in this horrifying Dateline episode featuring interviews with the law enforcement, family members, as well as some key figures in the case that led to it being cracked wide open.

The episode Secrets of the Sliding Door will air on May 4, 2025, and will be available to stream on NBC after the premiere.

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