TV Guide Oxygen Saturday

A loving husband and father's murder on Valentine's Day takes detectives on a twisted trail of infidelity, betrayal and a woman's deadly plan.

After a tipster hints at foul play, Tonya Rider and Kelly examine an unresolved homicide case in her home town to learn what happened to a college professor.

Johnny works with Kelly to determine if a woman, who disappeared in 2000, was the victim of a brutal murder or ran away with a mysterious man.

Investigators in Florida, search for the killer of Denise Hallowell, a beloved teacher.

Investigators in Florida, search for the killer of Denise Hallowell, a beloved teacher.

Investigative reports, breaking news stories, profiles of leading newsmakers and other features explore current events and topics of special interest.

Detectives investigate the disappearance of a 5 year old boy after his mother reports him missing from a carnival.

Detectives investigate the disappearance of a 5 year old boy after his mother reports him missing from a carnival.

A man calls 911 and reports he's been in a shoot-out with a car full of strangers in the California mountains, leaving two men injured and one man dead.

When a fight between neighbors ends in blood, the last man standing tells police his story, but the crime scene tells a different one.

A teenage track star's body is found in a field after sneaking out at night and getting caught up in a fatal love triangle in Mansfield, Texas.

The case of an elderly couple who died in their home goes cold until a family friend reveals the horrible truth after turning on their lover.

Attorneys from both the defense and prosecution talk about the arrest of billionaire Robert Durst after a torso is discovered floating in Galveston Bay, Texas.

Kelly Siegler investigates a deadly crime spree that's already taken the lives of two prosecutors only to realize the truth hits very close to home.

A murder mystery leads Kelly and Steve to Michigan, where they try to uncover information about an unknown car that was in the area when a woman was stabbed.

An examination into the brutal death of an elderly store owner in 1984 Texas, where his wife was notorious for having a violent temper.

In 2016, a hard-working mother gets strangled to death and dumped in a ditch.

Abbey and Kelly look for new clues in the fatal shooting of a mother of six that was initially thought to be a suicide, but their investigation exposes secrets.

The team investigate the disappearance of a mother who vanished during a family vacation and find evidence that she left town alive.

The team examine the strange death of a pregnant mother whose skull was found in the mountains.

A woman is found dead in an elevator and Barbara retraces the chain of evidence and she uncovers a domino effect of violence that leaves a trail of bodies.

Kelly and Steve travel to his home state to investigate the murder of a Navy veteran that was killed execution style in his lakeside home.

The team examine the strange death of a pregnant mother whose skull was found in the mountains.

A woman is found dead in an elevator and Barbara retraces the chain of evidence and she uncovers a domino effect of violence that leaves a trail of bodies.

Kelly Siegler finally talks about her most contentious case and what it took to get justice for the family of a murdered pregnant woman and her unborn baby.

After 20 years, the killer of an Idaho teenager is caught, and the man wrongly convicted of the crime sees a shocking turn of events.

After 20 years, the killer of an Idaho teenager is caught, and the man wrongly convicted of the crime sees a shocking turn of events.

Investigative reports, breaking news stories, profiles of leading newsmakers and other features explore current events and topics of special interest.