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Dateline: Written in Blood, April 22, 2024, NBC,



Dateline NBC

On Monday, April 22, at 1:00 p.m., NBC’s Dateline revisits the classic episode “Written in Blood,” which first aired on August 17, 2012. The episode centers around the murder of Karen Pannell, a former model and flight attendant, whose death leaves a mysterious message written in her own blood next to her body: the letters “R O C.”

The true-crime episode, reported by Dennis Murphy, investigates the shocking death of Karen Pannell and the subsequent search for her killer. The case unfolds with the discovery of Pannell’s body in her kitchen, stabbed multiple times.

The message written in blood points to her ex-boyfriend, Roc Herpich, who had a tumultuous relationship with Pannell, including a history of domestic violence. However, as the investigation progresses, new evidence and alibis clear Herpich of any involvement, shifting the focus onto another suspect.

“Written in Blood” follows investigators as they try to work out the true meaning of the cryptic message and work to identify the perpetrator, ultimately leading to a surprising conclusion.


“Written in Blood” airs Monday, April 22, 2024, at 1:00 p.m. on NBC.

Hey there! I'm Riley, the US TV Previews editor at I may have failed as a musician, but my love for Jeopardy knows no bounds. And let me tell you, The Wire is hands down the greatest TV show ever made. I've been writing about the entertainment biz since (mumble mumble). Stay tuned for all the latest TV news and previews!


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