Dr. Michael Swango took an oath to "do no harm." But he did just the opposite.  Suspicious illnesses and deaths followed this once-trusted physician-turned-killer from hospital to hospital for nearly two decades and across two continents.

Michael Swango - high school valedictorian, distinguished marine, trusted doctor... serial killer. For nearly two decades, this physician-turned-murderer left a trail of death and mayhem across two continents.

Six weeks after jumping bail in Galveston, Texas, Robert Durst is caught on a store security camera in Pennsylvania shoplifting a sandwich and is quickly sent back to Galveston to stand trial for the murder of his neighbor, Morris Black.

The unbelievable story of Robert Durst, the millionaire heir to a vast real estate fortune who has been linked to the deaths of his wife, his best friend, and his neighbor.

In April 1973, 24-year-old Edmund Kemper had murdered 6 coeds in and around the city of Santa Cruz, California, shaking the community to its core.

A frantic public, desperate for answers, live in terror, waiting for the man they dubbed "The Co-Ed Killer" to strike again. But no one could have expected that the person responsible, a local man, Edmund Kemper, was living among them.

A tip from a teenage boy leads to the identity of the Night Stalker. Twenty-four hours later a mob of angry citizens track him down and capture him.

The summer of 1985 was one of the hottest Los Angeles had seen in a century. But terrified residents weren't sleeping with the windows open, they weren't sleeping at all. A killer was on the loose. He was the Night Stalker.

For years the BTK killer plays a cat and mouse game with law enforcement and the media taunting them as he seeks the attention he craves. But then… he makes a mistake.

He calls himself "B.T.K." which stands for Bind, Torture, Kill and for decades this bloodthirsty serial killer terrifies Wichita as he murders again and again and again. Wichita residents live in fear that they will be his next victim.

In 1977, the city of New York was being stalked by a seemingly faceless serial killer known as, "Son of Sam." But after his final shooting took him to Brooklyn, a twist of fate and a little luck led to his capture.

He is among the most infamous serial killers in American history. From 1976 to 1977, David Berkowitz terrorized New York City - under his creepy self-given moniker: the Son of Sam.