In his only TV interview, a New York dentist vows that he didn't kill his lover's husband, who happens to be his best friend. Richard Schlesinger investigates.

A teenage girl was lured to her death using a smartphone app.

An investigation into the 1996 murder of a Texas widow that inspired the Jack Black movie "Bernie." At the heart of the probe is whether a mortician killed her and froze her body in order to live off her millions or to end years of abuse.

A young woman is murdered, police thought her killer was on the run ... or was he? Correspondent Tracy Smith investigates.

A stunning new twist in the case of a couple shot dead in bed. It looked like a hit job, but was it? "48 Hours" Troy Roberts and Erin Moriarty investigate.

A Texas-sized case of love, infidelity, road rage and possibly murder. "48 Hours" correspondent Peter Van Sant investigates.

A Colorado mom of three shot dead in her bedroom -- was it murder or suicide? "48 Hours" correspondent Erin Moriarty investigates.

A young mom vanishes after visiting her ex-husband -- could his accidental "butt dial" to 911 hold clues to what happened? CBS News correspondent Michelle Miller investigates.

Real estate broker Todd Kohlhepp kept a woman chained for two months; now he says he killed seven people -- "48 Hours" unravels the twisted life of an alleged serial killer.

"48 Hours" Live to Tell: A teen attacked by her abusive ex-boyfriend -- held at knifepoint, her room set on fire -- reveals her emotional story of survival to Tracy Smith.

"48 Hours" goes inside the mind of a serial rapist hunting his victims while two detectives were hunting him. Correspondent Maureen Maher investigates.

"48 Hours" Live to Tell: A father and basketball star is caught in a terror attack. Sebastien Bellin's remarkable story of recovery. CBS News correspondent Vladimir Duthiers reports.

Jacob Nolan, who claims his psychiatrist programmed him to kill her ex-lover, speaks out for the first time to "48 Hours" correspondent Peter Van Sant.

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.

A day care worker says she loved kids, yet she's in prison for killing one. If she didn't do it, why did she confess? "48 Hours"' Erin Moriarty has the latest in the Melissa Calusinski case.

"48 Hours" Live to Tell: Despite being blindfolded, kidnap victim Stanley Alpert was later able to lead the FBI to his captors. Special Agent Richard Meade explains how what Alpert remembered helped to solve this case.

Can a woman end 25 years of pain by forgiving her sister and brother-in-law's killer? "48 Hours" correspondent Maureen Maher reports.

A Palm Beach socialite kills her ex-husband and serves no time -- 20 years later, with the same gun, another family member is shot. "48 Hours" correspondent Richard Schlesinger investigates.

She was murdered at 23. Five suspects and cops couldn't arrest anyone. It was the perfect crime for 34 years -- until now. Correspondent Peter Van Sant investigates.

A stepfather sits in prison for killing his wife. Her daughters vow to keep him there. Does he deserve parole? Correspondent Tracy Smith investigates.

The murder of four young girls leads to two murder convictions -- but then everything fell apart; 25 years later, there's new DNA evidence. "48 Hours"' Erin Moriarty has the latest on the case she says she can't forget.

An ex-Marine with a secret life and a secret wife. A five-year investigation turns on shocking DNA evidence -- is the one-time hero a killer, too? "48 Hours"' Peter Van Sant has the latest in the case.

Two friends convicted of rape claim neither did it. Their families stuck by them. Now, more than 20 years later, a new DNA test will change everything. "48 Hours" correspondent Maureen Maher investigates.

Who killed a Las Vegas mob boss's daughter? Could the answers be in an unprecedented interview with millionaire Robert Durst? "48 Hours" correspondent Erin Moriarty investigates.

A wealthy doctor is violently murdered in his Florida mansion -- could a dark secret from his past provide a clue to his killer? Correspondent Peter Van Sant investigates.

A Florida doctor brutally murdered - her husband has an airtight alibi, but police travel 1,100 miles for a suspect that looks exactly like the dead doctor's husband. "48 Hours" correspondent Erin Moriarty investigates.

Singer Christina Grimmie was killed by a stalker and Ivanka Trump has been stalked, too; now, an "NCIS" star is trying to change stalking laws. "48 Hours" correspondent Erin Moriarty investigates.

Actress Pauley Perrette's push for stronger legislation that would better protect stalking victims.