DATELINE NBC Presents All New DEADLY CIRCUMSTANCES & SIMPLY DIABOLICAL On 4/20

New "Simply Diabolical" Airs Friday, April 20 at 9 p.m. ET/8 p.m. CT

A bizarre cyber-revenge case lands a young woman in jail and makes national headlines. Dennis Murphy reports on the unexpected twist that revealed the real culprit and the new developments in the case.

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All-New "Deadly Circumstances" Airs Friday, April 20 at 10 p.m ET/9 p.m. CT

When a Tennessee resident is murdered in her bedroom, investigators struggle to find answers with little evidence at the scene to link any possible suspects to the crime. Could it have been a burglary gone bad? Or, something else? Andrea Canning reports.

VIDEO PREVIEW

ABOUT "DATELINE"

"Dateline" is the longest-running series in NBC primetime history. In its 26th season, "Dateline" is anchored by Lester Holt and features correspondents Andrea Canning, Josh Mankiewicz, Keith Morrison and Dennis Murphy. Airing Fridays at 9 p.m. ET/8 p.m. CT and Sundays at 7 p.m. ET/6 p.m. "Dateline" reaches more than 20 million people every week through its broadcast, and millions more through its social media platforms. David Corvo is the senior executive producer, and Liz Cole is the executive producer. Follow Dateline on Facebook, Instagram and Twitter.

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