Dateline NBC “Deadly Omission” January 25 2026 Recap & Preview

NBC’s Dateline brings viewers a haunting Sunday night mystery with Deadly Omission, airing January 25, 2026, at 7/6c. Andrea Canning reports on a disturbing Georgia murder case that not only shattered one family, but also unlocked a dark secret tied to two unsolved murders from nearly a decade earlier.

The story begins in 2005 with the brutal murder of 39-year-old Kasi Peek in Smyrna, Georgia. As investigators searched for answers, the case stalled. But when new developments emerged, detectives began to see connections that led them back in time to the unsolved 1996 killings of Carol Marlin and Maggie Ginn in nearby Marietta.

As the details unfold, Dateline uncovers a complex web of lies, omissions, and long-buried truths. Interviews with law enforcement, family members, and those close to the victims piece together how two cases—once thought unrelated—were in fact linked by a single, devastating thread.

Deadly Omission is a powerful look at how justice can be delayed but not denied. Tune in Sunday night on NBC, with next-day streaming available on Peacock.