TV Guide Oxygen Monday

An in-depth look is taken at complicated investigations from beginning to end to determine if the case can be ruled an accident, murder or suicide.

When a Michigan man disappears, a series of unfortunate accidents occur that lead to the untimely death of a man who lives 400 miles away.

When a bus driver from a small-town is murdered, detectives launch an investigation and uncover secrets that were meant to stay hidden.

A small-business owner and his bride are murdered after their wedding, so the police investigate which makes them think they died because of a family feud.

A small-business owner and his bride are murdered after their wedding, so the police investigate which makes them think they died because of a family feud.

When a long-haul truck driver disappears, two people know his whereabouts because of a secret they hid for 27 years, which leads the truth to be revealed.

On-camera interviews and chilling recordings of meetings with a serial killer, who strangled eight women and dumped their bodies along roadways, are revealed.

A woman tells the story of how she was abducted by a couple while hitchhiking and forced to stay in a coffin-sized box for 23 hours a day for seven years.

A woman is accused of leading a band of anti-immigration vigilantes into a family's home and opening fire, killing a nine-year-old girl and her father.

A man is shot while driving to work and his estranged wife, adopted son and his wife's brother are accused of plotting to kill him.

A doctor and his wife are murdered in an elaborate murder-for-hire plot that a woman is accused of perpetrating with the help of her boyfriend.

A woman is arrested for the first-degree murder of her father, who was the mayor of her small town, and her brother is also arrested on the same charge.

Police from two states uncover a violent love triangle, a stalker, arson, and stolen identity as they investigate the sudden disappearance of an Iowa mother.

A homicide investigation is underway in Atlanta, Georgia when a charred body is discovered in the bed of a pickup truck engulfed in flames.

Detectives in southern Michigan launch an investigation into a horrendous crime after two Amish teenagers discover a corpse in a field while horseback riding.

After a pair of intruders break into a San Antonio home, two little boys find themselves without a father when an Air Force sergeant is shot to death.

A deadly love triangle comes to light in the midst of an international manhunt after a college student is brutally killed in Las Vegas.

Experts take an analytical look at the lives led by female criminals and consider how their mental states and experiences may have caused them to snap.

Investigators find themselves at a dead end when a New Jersey entrepreneur is mysteriously murdered until a drug bust helps lead them to a murder plot.

A delivery truck driver from Florida is shot under suspicious circumstances.

Detectives use advanced technology to identify a cunning murderer, who they believe killed a Baltimore man and left his decaying body in his garage.

Valentine's Day in an Indiana town is thrown into turmoil when members of law enforcement learn a violent murder has been committed.

California police investigate a delivery truck driver, who was shot to death in his vehicle, and discover an affair that led to a deadly retribution.

Investigating the sweet beginnings of romances and intimate attachments with nightmarish, bitter endings.

When a wife begins to fear for her life in a broken marriage, she turns to a man with self-defense skills only to learn someone else is in danger.

A wife and mother is beaten and strangled in her home on Valentine's Day, and the primary suspect is a beloved member of the community.

In the 2018 murder of chef Dan Brophy in Portland, Ore., detectives make a chilling connection to a blog post written years before.

A healthy 38-year-old woman suddenly becomes violently ill and dies an hour later in a hospital with no visible marks or other indications of how she died.