Season 4 - Episode Guide

Two women die suddenly under mysterious circumstances, and authorities initially suspect suicide. Both of their families believe it is murder and try to figure out who is responsible.

A mother of two and a young woman planning a career in science both die under mysterious circumstances, and two families embark on quests for justice.

What seems like a murder-suicide of a mom and her young son may be something else entirely. Next, when three young healthcare workers are murdered in succession, police fear the same killer could be responsible.

A 22-year-old National Guard officer with a bright future in law enforcement drowns in water only a few inches deep. Later, a 13-year-old cheerleader disappears, and authorities turn up evidence that may point to a gruesome murder.

A rookie police officer is heard confronting someone with a gun and is shot in the back of the head, but the D.A. believes it's suicide. And when a Navy veteran is discovered with wounds all over his body, police oddly think he died of pneumonia.

He seems like a great partner, but when Susan Osborne and her 14-year-old son Evan disappear, it turns out "Mr. Right" has a secret. Then, when a young man is shot in a street confrontation, all clues point to one man, but things may not be so simple.

A young woman's body is found 200 miles from home, and a retired police detective uses his podcast to crowd-source the search for her killer. And, when a young mother disappears, an old answering machine message could hold the key to finding her murderer.

A seven-month-old baby vanishes from his crib, and a family descends into an unimaginable nightmare; when a young mom disappears, there's no shortage of men in town for police to question.

When a 14-year-old boy goes missing, people in the neighborhood seem to know what happened, but no one calls the police. And, when authorities find a woman's dead, naked body, investigators hope DNA evidence will help find those responsible.

A young woman embarks on a trip to her father's homeland and is brutally murdered, and a young mother and her baby are shot as they are driving. Now the search is on to bring the killers to justice.