National Park Service ranger Paul Fugate vanishes into the mountains of Chiricahua National Park in Arizona. What was supposed to be a routine patrol hike through the sacred monument grounds turns into one of the largest and longest running missing persons cases in National Park Service history.

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The Unknown

Sometimes the most beautiful places hide the darkest secrets.

True crime

Thirty-three years after Douglas Wagg, Jr. turned up on a lone stretch of railroad tracks in the middle of the night in rural Martin County and over a year since Delia took on the case the scope of what was really going on in the area during the 1990's has come into view. Who was Doug? How did he end up so far from home? Who was he last seen with? Was the train really what killed him? Why was his case never investigated?

NEW SEASON: CounterClock Season 6

Have you ever thought about whose job it is to track international fugitives, hunt child abductors, conduct espionage, or pull human remains from concealed mass graves? Everyday thousands of good and decent people work in these Dark Arenas. They’ve chosen professions that grapple with the grotesque, deal with the deviant, and dodge the dangerous.

NEW LIMITED SERIES: Dark Arenas

When two friends sitting on a bench in an Ohio park are gunned down in cold blood, the investigators responsible for solving they murders are left dumbfounded.

The Friends

One of the worst crimes to consume British headlines in 1986 leads authorities on a search for a killer who was in the thick of a murder investigation the entire time.

The Suspect

When an elderly couple on a romantic camping trip in the bushland of Australia vanished from their burned-out campsite, authorities quickly identify a suspect.

The Unknown

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