A sudden moment of terror launches a frantic search for a costumed killer. Reported by Josh Mankiewicz, “Internal Affairs” is a story about bad choices, a fatal attraction and people who proudly wore badges at work -- while living lies at home. Follow now to get new episodes weekly, or subscribe to Dateline Premium on Apple Podcasts for early access and ad-free listening: apple.co/datelinepremium

When a wife and mother is murdered in Greeley, Colorado, responding investigators suspect the costumed killer is someone they know.

A secret affair gets discovered, and a murder suspect gets cuffed.

Choices about relationships, revelations and reconciliation set a murder in motion.

A detective plays cat and mouse with an unusual suspect, while crime scene evidence raises questions for investigators.

Recorded phone calls from a suspect in jail reveal the ties that bind unraveling.

A woman at the center of the case turns state’s evidence and the defendant takes the stand.

Hey, Dateline fans! As a bonus for you, we’re sharing the trailer for Something About Cari, an all-new original podcast series from Dateline and Keith Morrison. In this podcast Keith Morrison takes us to America’s heartland, where single mom Cari Farver disappears just weeks into a new romance. What follows is a series of strange and terrifying events, including taunting texts and threatening emails to Cari's boyfriend and his ex that escalate to stalking, arson and murder. But nothing could prepare friends, family, and investigators for the mind-bending twist that would come next… Follow now to get the first two episodes on Tuesday, December 2, completely free. Or subscribe to Dateline Premium on Apple Podcasts, Spotify or DatelinePremium.com to hear the first two episodes now. Subscribers receive ad-free listening and early access to subsequent episodes.

Hey, Dateline fans! As a bonus, we’re giving you a special preview clip of our new podcast series, Something About Cari. Keith Morrison takes us to America’s heartland, where single mom Cari Farver disappears just weeks into a new romance. What follows is a series of strange and terrifying events, including taunting texts and threatening emails to Cari's boyfriend and his ex that escalate to stalking, arson and murder. But nothing could prepare friends, family, and investigators for the mind-bending twist that would come next… If you like what you hear, just search Something About Cari to listen to the first two episodes now, completely free. Or subscribe to Dateline Premium on Apple Podcasts, Spotify or DatelinePremium.com. Subscribers get early access to new episodes and can listen to all Dateline podcasts ad-free.