A brutal assault on a hiking trail claims the life of an Arizona college student, and the case goes cold for nearly 40 years. But with advances in forensic science, a DNA profile finally reveals the identity of Cathy Sposito’s killer.

Police are dispatched to the New Falls Motel after receiving a call about an unresponsive female. Upon arrival, officers quickly disregard the story that she suffered a cardiac arrest when they see the extent of her injuries.

On December 31, 2015, Michael Deangelo Daniel's grandmother heard the doorbell ring. She saw a figure outside and called Michael. Michael and his girlfriend returned from church. She received a text from her ex-husband saying 'I’m outside.'

In Mobile, a man is gunned down in front of his family, and it's up to Det. Jermaine Rogers to sift through differing accounts of the incident to find the truth.

The key to solving the toughest homicides lies somewhere within the final 24 hours of the victim’s life. This true-crime documentary series follows investigators as they piece together events during this critical window.

After Santa Barbara Police find a PhD student shot dead on his doorstep, California investigators unravel a cold-blooded family plot that hinges on a single strand of DNA.

The key to solving the toughest homicides lies somewhere within the final 24 hours of the victim’s life. This true-crime documentary series follows investigators as they piece together events during this critical window.

The key to solving the toughest homicides lies somewhere within the final 24 hours of the victim’s life. This true-crime documentary series follows investigators as they piece together events during this critical window.

The disappearance of a young German backpacker from a small town in the Australian Outback isn’t an isolated instance. Could a serial killer be preying on tourists?

Armed with a fake ID, 19-year-old media major Kenia Monge is all set to make the most of her spring break. And when she doesn’t come home, it’s up to Colorado investigators to tighten the noose around a good Samaritan who’s anything but.

A housekeeper at the Village Inn Motel calls police when she finds a guest unresponsive and cold to the touch. While there are no immediate signs of a struggle or foul play, the autopsy confirms the cause of death was murder.

On February 17, 2005, Michael Paul Andrade, a university student with aspirations of becoming a doctor, was tragically murdered in his off-campus apartment in San Antonio, Texas.

A modus operandi that mimics natural death works to the advantage of a north Texas serial killer who preys on elderly victims. His murderous death toll is suspected of having amounted to 22 before a sinister clue leads to his capture.

A care home in the town of Newcastle, Australia, suffers the loss of two residents within two days. But these are not cases of old age taking its course.

Despina Ruman lived with her husband, James Ruman, and his son in their home in Grant Township, IL. Their marriage had reportedly been experiencing ongoing difficulties and tension in the period leading up to the incident, according to investigators.

Martre Coles was a 19-year-old aspiring artist from Richmond, Virginia, whose life unravelled after his mother’s death. Afterward, his relationship with his father, Maurice Coles, deteriorated when Maurice moved his new girlfriend into the home.

Police in Mobile, Alabama quickly identify a suspect in the murder of a local college professor, but a bombshell piece of technology stolen from the crime scene then points them in a completely different direction.

The family of a missing Texas mother becomes concerned when they start receiving suspicious text messages from her phone. Unsolved for years, a trail of digital clues ultimately helps investigators build a compelling case against her murderer.

Sarah is buzzing—it’s the N-Dubz concert, her favourite band. She goes with on-off boyfriend Darren Hall. The crowd dances, sings, celebrates. But Darren snaps. That night, he attacks her. Sarah flees, shaken, tells friends: “He’s beaten me up.”

Jessie spends Sunday night performing at a theatre festival. She gets home, falls asleep in her childhood bedroom. Her ex-boyfriend, Daniel Bartelt, breaks in. He strangles her and stages the scene. Her mother finds her the next morning.

Shane and his pregnant partner Laura have a cosy night out—a quiet pub meal in their rural East Yorkshire village. But their neighbour, Anthony Lawrence, is hiding in their attic with a crossbow.

On February 17, 2005, Michael Paul Andrade, a university student with aspirations of becoming a doctor, was tragically murdered in his off-campus apartment in San Antonio, Texas.

Investigative series examining murder cases told through the personal experience of retired Colorado detective Lieutenant Joe Kenda.

Investigative series examining murder cases told through the personal experience of retired Colorado detective Lieutenant Joe Kenda.

Despina Ruman lived with her husband, James Ruman, and his son in their home in Grant Township, IL. Their marriage had reportedly been experiencing ongoing difficulties and tension in the period leading up to the incident, according to investigators.

When two teenage classmates in Northern California go missing within weeks of each other, their mothers struggle to get police to take the situation seriously.

After a 69-year-old woman is found dead in her bathtub, a suspect leads Tulsa detectives on a high-speed chase that ends tragically.

Investigative series examining murder cases told through the personal experience of retired Colorado detective Lieutenant Joe Kenda.

Investigative series examining murder cases told through the personal experience of retired Colorado detective Lieutenant Joe Kenda.

On February 17, 2005, Michael Paul Andrade, a university student with aspirations of becoming a doctor, was tragically murdered in his off-campus apartment in San Antonio, Texas.

A care home in the town of Newcastle, Australia, suffers the loss of two residents within two days. But these are not cases of old age taking its course.