Season 4

A young mother is found murdered in her home; detectives suspect her fiancé or ex-husband.

After a house fire is deemed intentional, detectives believe a close family member lit the match.

A man is found dead in his backyard; the investigation leads to a woman he welcomed into his home.

A Florida man is reported missing and detectives are investigating his roommate.

Detectives uncover a sinister murder plot masterminded by someone within their inner circle.

A man is stabbed to death; detectives discover a sex worker who may have wanted him silenced.

Detectives hope a woman can identify her attacker as she fights for her life after being shot.

After a young father is strangled to death, authorities must track down a group of friends.

A young woman is found murdered and an elderly couple is reported missing.

A beloved father is shot to death at home; detectives unravel a plot devised by his inner circle.

In Northern California, a young woman goes missing after a night out on the town.

When an aspiring musician goes missing, police turn their attention to his roommates.

Neighbors find an elderly veteran injured claiming he was kidnapped and beaten. As the 91-year-old's health rapidly declines, pressure mounts for detectives to obtain a confession from the perpetrators and get justice for the decorated war hero.

A beloved pediatric dentist is shot dead in a parking garage.

Investigators search for answers from a teenager they suspect stabbed his two high school friends.