Jorge Ponce sets out to try and discover the identity of "Medina," a mysterious character who has spent the last 20 years scamming dozens of TV personalities by pretending to be a former colleague with a personal drama.

A chronicle of the twisted lives of some of the most frightening, diabolical characters in recent history. Each two-hour episode traces the heinous, criminal acts of these elusive miscreants and the eventual road to justice.

The documentary takes a detailed look at the disappearance of 3-year-old Madeleine McCann, who vanished while on holiday with her family.

Bloodwork is a brand new series focusing on incredible criminal cases in which the resolution was brought about by the use of forensics. Each episode highlights not only a fascinating case, but the real-world investigator without whom it could never have been solved.

Dateline NBC, or simply Dateline, is a weekly American television newsmagazine series. It was previously the network's flagship newsmagazine, but now focuses mainly on true crime stories with only occasional editions that focus on other topics.

True stories of Finnish criminal acts. Most of the stories have been previously published in the Nordic Police Stories book series.

Everyone is hiding something. It may be a harmless secret or it might be something far more serious. In this spellbinding series, hear stories of murder investigations that gradually exposed one truth after another, until everyone's truths are laid bare. There are little white lies, and then there are the lies that kill.

Documentary series exploring what happens when flights lose control.

While mixing the comedy and documentary formats we follow the search for Harold Heaven, who mysteriously disappeared from his remote cabin in Ontario, Canada, in the winter of 1934. Local police searched the nearby woods and dredged the adjacent lake, but Harold was never found nor heard from again. 85 years later, his great-great-nephew, Mike, attempts to solve this coldest of cold cases, with the help of his extended family and true-crime-obsessed best friend, Jackson.

Working for nearly three decades with the Charlotte (N.C.) Police Department, Detective Gary McFadden has developed unorthodox methods that have helped him solve more than 700 homicide cases. He has a 90-percent success rate with the investigations he pursues. "I Am Homicide" shows how Detective McFadden uses his street smarts to work the neighborhood networks and gather critical information for leads, at times risking his life by trusting the streets he calls home.

The story of how the lottery invented to finance a zoo was incorporated by Rio de Janeiro's popular culture and, in the hands of organized gangsters, transformed itself into an immense crime empire.

NBC News correspondents Keith Morrison, Josh Mankiewicz, Stephanie Gosk and Andrea Canning examine the final day of a victim’s life – the split-second decisions and pivotal moments that made the difference between life and death. Detectives retrace those crucial hours looking for clues to solve the mystery.

Mixing present-day interviews with previously unheard recordings, this true-crime series examines serial killer David Berkowitz's mark on 1970s New York.

This true-crime series investigates the 1998 disappearance of a 23-year-old woman from a Caribbean cruise and her family's tireless search for answers.

Explores the mysterious death of Bianca Rudolph on an African hunting trip.

Four close friends' seemingly perfect lives unravel after one vanishes on a hunting trip. Nearly 20 years later, the truth emerges with devastating consequences.

Tracks the rise and fall of serial killer expert Stéphane Bourgoin whose dark lies are exposed by sleuthing fans.

High-stakes exploits turn deadly — and shake a global church to its core — in this extraordinary true crime story.

Questions persist about the last night of Mario Biondo, the husband of Spanish TV host Raquel Sánchez Silva. This true-crime series uncovers new details.