An investigation into whether a New York woman killed her fiancé during a kayaking trip on the Hudson River.

"48 Hours" goes inside the investigation of the death of the UVA student and the evidence that links the alleged killer to other crimes spanning a decade. Susan Spencer reports.

Hearing her father's screams for help, Jenna Neulander dialed 9-1-1 and summoned first responders to her home. Her father, Dr. Robert Neulander, a prominent obstetrician, was trying to help her mother, Leslie, who was unresponsive in the shower.

Eighteen months after Leslie Neulander died, her husband was charged with her murder. One of the key witnesses in the case? Their daughter, Jenna. But does her 9-1-1 call help the prosecution or the defense?

A couple shot dead in bed. It looked like a hit job. Was it a business deal gone bad or was the enemy closer to home? "48 Hours" correspondent Troy Roberts investigates.

A beautiful mom is murdered while her West Point grad husband was at work. Was someone stalking women in Las Vegas? "48 Hours" correspondent Peter Van Sant investigates.

When a young U.S. Army combat medic goes missing, a bounty hunter takes on his biggest case ever. "48 Hours" correspondent Troy Roberts investigates.

Did a cartoon play a part in the death of a California man? "48 Hours" correspondent Richard Schlesinger investigates.

As the world reacts to the attacks in Paris, CBS News reports on the shootings, the aftermath and what's being done to prevent similar incidents worldwide

48 Hours re-examines and updates the case of Harold Henthorn whose wives Lynn and Toni died 17 years apart in what were supposedly freak accidents. Police investigators, however, believe that Harold murdered them. Eventually, Harold is arrested and convicted of first-degree murder.

A man wanted in the murder of his wife makes an outrageous claim – the U.S. wants to silence him for what he saw at Ground Zero

48 Hours looks at the 1990 murders of Richard and Nancy Bishop Langert by David Biro in Chicago, Illinois. It examines how Nancy's sister Jeanne through her Christian faith has learned to cope with the deaths and has even forgiven her sister's murderer.

48 Hours examines the case of Dorothy Lee who kidnapped her daughter in the middle of a bitter divorce with her then-husband Harris Todd. She eluded the FBI for two decades eventually settling in Australia. Recently arrested she tells her side of the story and her daughter reflects on the past she never knew about.

48 Hours updates its story on the 2014 murder of heiress Nancy Pfister in Aspen, Colorado. Trey Styler was convicted after his confession to the crime. He has since committed suicide while in prison. His wife has changed her name and moved to a different state.

Is Mechele Linehan a conniving ex-stripper who should be in jail for murder, or was she unfairly targeted by police because of a past life? Susan Spencer investigates.

Is Mechele Linehan a conniving ex-stripper who should be in jail for murder, or was she unfairly targeted by police because of a past life? Susan Spencer investigates

Convicted of murder at 19 -- 14 appeals and 10 years later, he's free. They got it wrong. End of story? Not yet. "48 Hours" correspondent Erin Moriarty investigates.

Can millionaire Robert Durst beat another murder rap?

A Texas town on edge -- someone was killing prosecutors. Was it a gang hit or could the killer be one of their own? "48 Hours" correspondent Richard Schlesinger investigates.

What happens when a former hard-charging prosecutor is prosecuted for his wife's murder in his old courtroom? "48 Hours"' Maureen Maher investigates.

Was the shooting of a Seattle man a random incident of road rage, or was the gunman a self-taught killer intent on finding the perfect moment to kill? Peter Van Sant investigates.

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A popular football coach is serving life for killing his pregnant wife -- was evidence hidden that could set him free? "48 Hours" correspondent Richard Schlesinger investigates.

An elite FBI agent shoots his wife after he says she came after him with a knife -- was it self-defense or murder? "48 Hours" correspondent Susan Spencer investigates.

Three friends walk into a studio apartment, and only two come out alive. At least one of them is a killer, but which one? Richard Schlesinger investigates.

In her only interview, a mother convicted of murder by poisoning her son with salt claims it was the hospital's mistake. Is she right?

Five decades after the murder of the beautiful school teacher, her long suspected killer -- a former priest -- is in custody. A new witness stepped forward, but despite this new evidence, there would still be no indictment ... until now.

A lawyer shot -- his girlfriend admits she pulled the trigger and then dances in a strange police video -- was it self-defense or love gone bad? "48 Hours"' Peter Van Sant investigates.

A lawyer shot dead at home - his girlfriend admits she pulled the trigger and then dances, twirls and snaps her fingers in a strange police video. Was it self-defense or love gone bad?

Two teens killed on the same California beach six years apart. DNA on one of the victims leads to two suspects -- one of them worked for the police. Richard Schlesinger investigates.

A young wife shot dead -- her soldier husband pulled the trigger. Was it an accident or was it murder?

Olympic hero Dave Laut shot six times -- his wife pulled the trigger. Was it murder or self-defense? In her first TV interview, Jane Laut tells Erin Moriarty she's been hiding a secret.

Part 1: All 12 living CIA directors share their passionate disagreements about the agency's past, its current mission, and its future

All 12 living CIA directors share their passionate disagreements about the agency's past, its current mission, and its future

Over the past nine years, Cal Harris has gone on trial for the murder of his wife, Michele, four times. He was convicted twice, even though Michele's body has never been found. Both verdicts were overturned. A third jury couldn't decide. Now a fourth trial. Will this be the final one for Cal Harris?

"48 Hours" goes inside the investigation of the death of the UVA student, the evidence that links one man to three horrific crimes, and now, his punishment. Susan Spencer reports. (Updated)

A "48 Hours" special on the aftermath of the deadly police shootings in Dallas -- what will it take for America to heal?