The case involved detective work so unique, it managed to stay with Dennis Murphy for years; days before Christmas, Michelle Martinko was visiting the mall when she was found stabbed to death; investigators found her killer almost 40 years later.

It's a chilling story unlike anything Dennis Murphy has seen before, or since. A beautiful college student goes missing from her off-campus job. A week later, investigators receive a mysterious phone call that changes everything.

A case with a plot so diabolical, Dennis Murphy had to revisit. Venus Stewart stepped outside her door and vanished. Investigators suspected her ex, but he had an alibi. Then a video gamer’s tale had detectives seeing double and exposed the truth.

When a college student is found dead after a party, his mother is determined to find out what happened. What follows is one of Dennis Murphy’s most memorable stories, as this tenacious mom fights to get her son’s case in front of a jury.

A beloved couple was found murdered among a lifetime of valuable collectables in their home, an extraordinary place Dennis Murphy wanted to look back on. Investigators wanted to know if there was a connection between the memorabilia and the murder.

A man charged with murder claims it was impossible for him to have committed the crime. For Dennis Murphy, the surprising courtroom strategy provides a memorable twist.

This case has stayed with Dennis Murphy since he first reported on it: A determined young woman searches for answers in her mother’s mysterious death. Her decades-long quest leads to a dramatic courtroom decision.

When a star athlete at an Ivy League university goes on trial for murder, sparks fly in the courtroom. The trial ends with a stunning decision that Dennis Murphy will never forget, but the surprises in the case are just beginning.

Dennis Murphy reported on the twists and turns of the Jennifer Dulos case as they happened. He offers candid insight into his one-on-one interview with the prime suspect: Jennifer’s ex-husband, Fotis Dulos.

An aspiring Playboy model is murdered in Miami, FL. A seven second clip of her last moments alive are caught on security video and could hold key clues. The haunting images make this case one of Dennis Murphy's most memorable.

When a pastor loses a second wife in an accident, authorities become suspicious. Dennis Murphy returns to this unforgettable story of evil and betrayal, wondering how far this a man of God might have fallen. Dennis still can’t believe the answer.

After a 15-year-old girl disappears, investigators discover a creek where the local teenagers hang out. Dennis Murphy looks back on the case that kept him guessing until its astonishing conclusion.

Gary Hilton is a name Dennis Murphy will always remember. A hiker goes missing and authorities suspect Hilton is reenacting a slasher movie. Dennis reflects on the real-life murder spree that terrorized the American South.

When a novelist's wife is found dead at the bottom of the stairs, investigators wonder if it is an accident or murder; Dennis Murphy interviews main suspect Michael Peterson and returns to the case with insight only he can share.

A double homicide in upstate New York leads detectives on a cross-country investigation; Dennis Murphy reflects on a story full of twists and turns, including the surprising suspect at the center.

When an Iowa woman is attacked while home alone with her three children, the confrontation turns deadly; Dennis Murphy examines one of the most sophisticated criminal plots of his "Dateline" career.

The heir to a legendary hotel is brutally murdered, and detectives learn he had no shortage of enemies; Dennis Murphy takes a fresh look at this extraordinary investigation, a hunt for a killer he calls the most ruthless he's ever seen.

Newlywed Dalia Dippolito comes home from the gym to find out her husband has been killed; in a case Dennis Murphy will never forget, almost nothing is as it seems; he explores whether Dalia was a pawn in a hoax gone wrong or simply diabolical.

A couple takes a scuba-diving trip to the British Virgin Islands. On their last dive, one of them surfaces but the other does not. Police quickly suspect the drowning was no accident. Now Dennis Murphy gives this unforgettable story a second look.

When Tina Sandoval disappears, her parents and loved ones spend years searching for her; Dennis Murphy takes a fresh look at the secret Tina kept and at the demon who forced her loved ones to make an agonizing decision.

A Florida father is determined to find out what happened to his daughter after her fatal fall from a penthouse apartment; Dennis Murphy revisits the dramatic events as this dad confronts overwhelming obstacles to learn the truth.

When a woman is found dead in her SUV, the investigation into her murder reveals a tangled web of sex and lies. Dennis Murphy looks back on his unusual interview with the lead suspect.

To many, it seemed like a romance between a former football player and homecoming queen; but when it ends in death, the police investigate; Dennis Murphy reflects on a secret relationship that led a churchgoing couple down a dangerous path.