Season 4

When two women die suddenly under mysterious circumstances, authorities initially suspect suicide. But both of their families believe it was murder, and are trying 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.

The murder-suicide of a mother and son may be something entirely different.

A family suspects foul play when their son drowns in a few inches of water.

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. Could this case be that 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.

Someone snatches a baby boy from his crib, and a young mom goes missing.

A 14-year-old boy vanishes, but neighbors don't tell police what they know.

A young woman on a trip to her father's homeland goes missing, then turns up brutally murdered. Another young mother and her baby are shot as they drive along a highway.