A mother finds her daughter strangled to death in their home. Her ex-boyfriend had been stalking her - but is the real killer someone much closer to home?

When a single mother is stabbed to death in her home in Cape Cod, the numerous suspects include her child's father, his wife and her eccentric father's young girlfriend.

In Bronx, N.Y., police investigate the murder of 20-year-old Kimberly Antonakos who was set ablaze while still alive.

A business owner is shot to death outside his office. Police find he was deep in debt. Did he arrange a hit to provide for his family with the life insurance?

When a woman is murdered in Milwaukee, her sons describe a masked man with a ponytail fleeing from the home, and police investigate the victim's rancorous ex-husband and a neighbour who claims his gun was stolen.

An oil executive goes missing in front of his New Jersey home. Police fear a medical emergency until a ransom note arrives from an eco-terrorist organisation.