Police have 48 hours to chase down a lead when a teenager gets caught up in a gang's deadly feud.

In Tulsa, a woman goes on the run after her boyfriend is killed, while in Atlanta an Army veteran is gunned down after helping a homeless man.

When a young father-to-be is shot dead by a single bullet fired from afar, it's up to Lieutenant Joe Kenda to hunt down the bloodthirsty sniper.

The documentary series continues as retired Colorado Springs police detective Joseph Kenda reflects on another harrowing case.

Detectives race the clock when an elderly man perishes in a suspicious fire and a man is killed in front of his two-year-old daughter.

When a man is gunned down protecting his wife, police detectives hope his ex-wife can reveal who may have wanted him killed.

A decapitated body is discovered on some train tracks and a young girl's body is found in a basement. Lt Joe Kenda investigates both murders.

The death of an Iraq War veteran is investigated.

A 68-year-old loses millions in a casino. Then, when she checks into its hotel, she vanishes. Police race the clock to get answers.

When a young Atlanta man is shot and left to die in the bushes, detectives believe a mysterious white town car is the key to finding the perpetrator.

Lieutenant Joe Kenda encounters a horrendous crime scene, but his hunt leads him to the most unexpected of killers.

Joe Kenda is stumped for suspects when a woman is found dead in her car. Can he uncover and unravel her mysterious double life in order to find her killer?

Paula Zahn explores more true crime stories. Here, San Diego police race to catch a killer with an unthinkable calling card.

Paula Zahn explores the case of a teenager's shocking murder that shattered the peace in a small town and destroyed her family.

Recently separated single mother Dana Laskowski is found strangled to death in her home on a night when her triplets are visiting their father. The crime scene suggests she knew her attacker, and the investigation reveals there are more than a few people who had an unhealthy obsession with Dana.

Shortly after 19-year old Devon Guzman moves in with her partner Keary, she is found dead in the backseat of her car. Was it a suicide? A drug overdose? Something doesn't add up to accident, especially when police find out her relationship is an "open" one with more than one jealous lover.

Detective Kenda's interrogation skills are put to the test when he investigates the strange disappearance of a 24-year-old woman.

Detective Kenda investigates two murders in the same apartment block. Are they linked? And if so, can he catch the culprit?

In 1988, Beverly Eller was found murdered in her home. Years went by before a piece of evidence surfaced that tied an unlikely suspect to the crime.

In 1972, a postal worker is found brutally murdered in his San Diego apartment. Investigators wade through suspect after suspect, from close friends to hardened criminals. Thirty seven years later, old evidence points them to their killer.

The clock is ticking for Tulsa's detectives as they race to catch a dangerous gunman who executed one man in the street and shot a second victim nearby.

After a night out leaves an innocent man dead, detectives follow up on solid leads that go nowhere. But then they discover a motive they never expected.

When close friends Louis Matos and Colleen Johnson are gunned down in cold blood for no apparent reason, it's up to Lt Joe Kenda to find the perpetrator.

The investigation into a man's murder initially indicates that he was shot over a musical instrument, but Kenda digs deeper and determines the actual cause.

Detectives Mike McCleery and Bob Bachelder investigate the murder of a promising high school senior, shot to death the week before Christmas and stuffed in the trunk of his car, 25 miles from home.

A Tulsa man is gunned down in broad daylight, while in New Orleans a man is shot after a text message lands in the hands of a killer.

A huge barroom brawl ends with the shooting of a young army solider. To unravel the murder, Lt Joe Kenda must infiltrate a revered military institution.

The documentary series continues as retired Colorado Springs police detective Joseph Kenda reflects on another harrowing case.