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, we’re giving you a special preview clip of our new podcast series, Deadly Mirage. The story takes place in the Silver Lakes, a lush manmade oasis in California’s Mojave Desert, where Rob and Sabrina Limon seem to have the perfect life: two young children, a beautiful home, and a tight-knit group of friends. But when Rob is found murdered, investigators uncover deep secrets about sex, friendship and religion that shatter carefully crafted illusions...

If you like what you hear, just search Deadly Mirage 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.