Investigation Discovery +1 Sunday

A parking lot showdown terrifies onlookers. A fender-bender leads a motorist on an epic chase. An aggressive driver uses an unusual weapon on her victim

An off-duty police officer pulls a gun on another motorist. A machete-wielding man attacks a delivery driver, and an SUV nearly runs down a cyclist

A TV personality has a violent encounter with another motorist. A dramatic car chase has a fiery end, and weapons are used in angry road encounters

An axe-wielding man taunts a motorist. Protesters disrupt a highway, infuriating motorists, and two raging drivers have a roadside showdown

A case in which a mother and her adult son were fatally shot in an apartment complex. With no initial suspects, detectives sought answers in shell casings, shoe impressions and DNA

A case in which a man contacted US emergency services after finding blood inside a friend's home. Bloody footprints and a credit card trail led to the killer

A case in which a paramedic and mother was found dead, covered in paint, in the basement of her Massachusetts home

The case of 18-year-old Heidi Allen, who vanished from her job in a convenience store. Two brothers were arrested for kidnapping, but years later a chilling new story emerged