TV Guide Oxygen Sunday

A young woman with an active online presence and a love for posting on social media suddenly stops communicating with loved ones.

A young woman overcomes a dark childhood and has a bright future to look forward to until the Canadian high school senior is found dead on the side of the road.

Police unravel family secrets and uncover a surprising suspect after a night celebrating a college graduation ends in bloodshed when a gunman attacks a family.

After a graduate student is shot and killed near her apartment in North Carolina, authorities try to discover who shot her and why.

After a graduate student is shot and killed near her apartment in North Carolina, authorities try to discover who shot her and why.

When a woman starts a relationship with a new man, her daughters investigate their mother's new beau and expose the dangerous plans of a con man.

When a woman is welcomed into the lives of a pastor and his wife, a newfound spiritual awakening leads to her mysterious disappearance.

When a woman reappeared just two days after her boyfriend reported her abducted, police accused the couple of perpetrating a hoax, but they soon reconsider.

While investigating a businessman's murder, the police expose a tangled web that extends from the Pacific Northwest all the way to an oil patch in North Dakota.

Detectives search for answers after Annastasia Hester is stabbed to death in Portland, Oregon; investigators uncover multiple suspects and possible motives.

Correspondent Keith Morrison reports on the story of a young woman whose disappearance leads to a story of a chance encounter with a stranger on a train.

A young man is lured to a store parking lot by an ex-girlfriend who claims to be afraid of him because of past abuse, but when she arrives, the man is shot.

Several years after what is being called a deadly home invasion, a woman must answer additional questions about the death of her mother.

After the burned body of her baby sitter is found, a mother with four young sons and a history of violence and abuse faces a devastating sentence.

A respected family man is found shot to death in his upscale California home. Detectives race to find his killer; a startling confession exposes a web of lies.

A man is gunned down inside his home in what appears to be a planned hit. Investigators turn to an unstable ex whose plot to kill shocks the rural community.

When a school teacher is found shot to death, an unusual gun silencer, missing money and the victim's own meal plan help unlock a devious murder plan.

A woman, who volunteers as a church secretary, is found shot to death and a woman, who may have seen her as a romantic rival, is accused of her murder.

A man is gunned down inside his home in what appears to be a planned hit. Investigators turn to an unstable ex whose plot to kill shocks the rural community.

When a school teacher is found shot to death, an unusual gun silencer, missing money and the victim's own meal plan help unlock a devious murder plan.

An armored car robbery and Santa Claus bandit captivate headlines, and the crime goes unsolved for years until a local man is found buried in the snow.

Weeks after his family reports him missing, parts of a 62-year-old man's dismembered body are found and his girlfriend is accused of brutally murdering him.

A woman is accused of crashing her car and killing her husband because of alleged abuse, and then confessing to the crime to an online dating site "match."

After a man is shot to death in his own home while he slept, his wife is accused of committing the crime and enlisting the aid of her teenage brother.

Details are shared about a violent crime that occurred in a wealthy neighborhood that led investigators to discover a deception related to a murder case.

Details are shared about a violent crime that occurred in a wealthy neighborhood that led investigators to discover a deception related to a murder case.

When a couple experiences a seemingly perfect life, their relationship becomes a tragedy after a woman is found shot to death and an innocent person is caught.