The harrowing story of the 9/11 attacks, as told by NYPD first responders who rushed to Ground Zero and who still carry the weight of tragedy today.

"The case of Lourdes Gonzalez haunted me." Detectives revisit the gruesome murder of a young mother — and the infamous Central Park killer who did it.

A serial killer targeting young victims in East Harlem evades police until details connected to crimes from years earlier emerge.

The stabbing death of a successful entrepreneur remains unsolved for decades until a tenacious assistant DA and a driven detective reexamine the case.

After an eviscerated body is found in Central Park Lake, a pair of unlikely suspects are implicated in the killing as shocking revelations surface.

A former California senator's daughter vanishes, leaving behind a horrifying, blood-stained car. Is her murder political payback — or something else?

A murder at the mansion of music producer Phil Spector lands detectives in the crosshairs of one of Hollywood's most sensational celebrity cases.

When a Hollywood studio executive goes missing, a tumultuous affair comes to light, leading investigators to suspect foul play.

When a legendary race car driver and his wife are shot in their driveway, investigators zero in on a cold-blooded suspect for the shocking murders.

After the discovery of a woman's body on the beach, suspicion falls on her husband as the killer — until new technology helps detectives crack the case.