A New York dentist denies killing his lover's husband -- who was also his best friend.

Coverage of the aftermath of the police shootings in Dallas that left five law enforcement officers dead and several injured.

After nine years and four trials, has the search for what happened to Michele Harris and the case against her estranged husband Cal Harris come to a close? Erin Moriarty and 48 HOURS report the latest in the case in an updated edition of "Cal Harris: The Final Verdict".

What are the rules in the war on terror for America's spymasters? Will the next president bring back waterboarding as an "enhanced interrogation technique?"

The broadcast network premiere of 48 HOURS PRESENTS: "The Spymasters – CIA in the Crosshairs" raises those questions and more as it takes viewers inside the inner workings of the CIA through the eyes of all 12 living directors of the agency. The directors talk openly about tough calls they've had to make, the controversies they have faced and what it takes to be a master spy.

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.

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

Richard Schlesinger and 48 HOURS investigate the unsolved case of the two murders, the incredible similarities in the two killings and the new technology that would lead police to investigate one of their own.

A successful young attorney is gunned down in his own home. The shooter? His on-again, off-again girlfriend, a beautiful, young graduate student. She says it was self-defense. Police say it was something else.

A successful young attorney is gunned down in his own home. The shooter? His on-again, off-again girlfriend, a beautiful, young graduate student. She says it was self-defense. Police say it was something else.

At the time of his death, Poston was a 29-year-old self-employed lawyer with a promising future ahead of him. Hubers, too, was "very, very, bright," according to Highland Heights, Kentucky Police Chief Bill Birkenhauer.

"When he walked into a room, he immediately demanded attention," says Poston's friend, Allie Wagner. "And he got it. He was a very good-looking guy and he had a very big heart."

What is certain is Hubers shot Poston. She admitted she shot him the moment she dialed 9-1-1. But what led to the shooting, however, is where the story takes unexpected turns. After the incident, Hubers was taken to police headquarters. There, she told police she wanted a lawyer but then, unexpectedly, she began talking on and off for more than two-and-half-hours with a police camera rolling. Hubers also danced, sang and snapped her fingers humming, "I did it! Yes, I did it." Portions of the video will be broadcast by 48 HOURS.

Three friends, all with big futures ahead of them, headed to a tiny studio apartment near Washington D.C. after a night of barhopping. Sometime afterwards, one of them was butchered with a knife. The two survivors then told police they don't know what happened.

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

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.

A couple's mountain hike turns deadly. The girlfriend had a haunting premonition -- did she predict her own murder? "48 Hours'" Peter Van Sant investigates.

Yancy Noll, a well-liked Seattle wine steward, left work one evening in 2012 and headed home. Ten minutes later, he was dead. Peter Van Sant and 48 HOURS investigate the death of Noll and the trail that would lead police to an unlikely suspect in "A Student of Murder".

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

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

Eighteen years after a California woman was kidnapped, assaulted and left for dead, DNA evidence leads to the arrest of an actor and his high school friend.

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?

Dorothy Lee Barnett on how she fled the United States with her daughter, eluding the FBI for two decades.

A woman seeks closure by speaking with her sister and brother-in-law's killer more than 20 years after their deaths.

Police in Denver think Kurt Sonnenfeld murdered his wife, Nancy, but he insists that she committed suicide.

Terrorist attacks on Paris

A woman stands a second trial for killing her husband, claiming it was an accident after the two of them re-enacted a Bugs Bunny cartoon.

A bounty hunter searches for a young army combat medic who went missing after a night out at a local bar.

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

Family members believe a young man's fascination with the a notorious Menendez brothers murder case led him to allegedly shoot his parents.

When a doctor is charged with killing his wife, their daughter's 9-1-1 call becomes important to the case.

Susan Spencer and 48 HOURS investigate the tragic disappearance of University of Virginia student Hannah Graham and the tireless police work that linked her alleged killer to other cases.

Susan Spencer and 48 HOURS investigate the tragic disappearance of University of Virginia student Hannah Graham and the tireless police work that linked her alleged killer to other cases.

Can new evidence obtained by "48 Hours" prove there was no murder in the case against a New York woman charged with killing her fiancé during a kayaking trip?