Friday

The woman had been sexually assaulted, stabbed repeatedly, and left for dead. She survived, and gave police a detailed description of her attacker. When someone who fit that description practically turned himself in, police were sure they had their man... until the DNA evidence proved them wrong.

The victim was a self-made man who never minced words. Perhaps he was murdered by a disgruntled client or employee. Perhaps the racy photos in his safe held the clue to solving the crime. Or perhaps with the help of the IRS, investigators could follow the money and find the killer.

A family vacation turns into a nightmare when the wife is found face-down in the lake. There are no witnesses and little conclusive evidence to help police determine if they’re dealing with a suicide, an accident, or something more sinister... until a forensic pathologist uses a groundbreaking technique to discover the truth.

The woman in the back of the truck was flailing her arms, screaming. They thought she was doing something dangerous for the fun of it. But when they found a jacket near a pool of blood, they knew what they’d seen wasn’t a joy ride; it was an abduction.

Tool marking: A tool used to commit a crime can often be the same tool used to solve it. The pattern a machine leaves on an item, the unusual way a tool crimps a wire, and even something as innocuous as the shape of a wood chip can lead to a killer.

In the 1990s, neighborhoods in Detroit were terrorized by a gang of robbers. Impersonating police officers, they invaded over 100 homes robbing, raping and torturing their victims.

In the 1980s, the United States faced a deadly new enemy abroad, an expanding network of terrorists targeting American interests. Hundreds of innocent people were killed in bombings, executions, and hijackings.

Arizona v. Mark Gooch. A camper gathering firewood in Arizona's scenic Sunset Crater National Park was shocked to discover the body of a young woman in a traditional long dress, wearing black dress shoes. Her Mennonite family and friends were stunned — she had no known enemies and was a beloved, studious young woman, who loved books. How did she end up dead so far from home? Using sophisticated investigation techniques, police analyzed cell phone tower records and grainy surveillance videos that led them to their number one suspect.

Serial killers are often twisted geniuses; so cunning that catching them seems almost impossible. But from jack the ripper to those who terrify us today, their bizarre behaviour is as specific as a signature. Sophisticated crime fighters map the psychological and physical terrain of multiple murderers.

Former Deputy Sheriff of Colbert, Georgia, Tracy Fortson shoots her boyfriend Douglas Benton as he sleeps, then abandons his body in a cement-filled trough in the woods.

Nicole Abusharif, 26, murders her partner Rebecca Klein for the insurance money, then leaves her body in the boot of her car for a night of drinking with her young lover, Rose.

Ramon and Lulu are living the American Dream, until one of them ends up in a shallow grave – and a man from their boxing gym is right in the middle of the murder plot.

In the late 1970s, the FBI had a working knowledge of anti-Castro terrorists operating in the United States. But then a new group appeared, more violent and aggressive than their predecessors.

In the late ‘70s and early ‘80s, a legitimate Puerto Rican independence movement took hold in the United States. But a splinter terrorist group known as the FALN was suspected of executing hundreds of bombings in major US cities.

In the early 1990’s Philadelphia became the scene of a bloody vendetta. The streets erupted in mob warfare. Authorities feared innocent people would be caught in the crossfire.

In the late 1980s the FBI matched wits with a cunning bank robber, a lone gunman responsible for the longest string of unsolved bank robberies in FBI history.