Investigation Discovery +1 Saturday

Influencer Mackenzie Shirilla seemingly has it all. But a tragic accident reveals the dark side of social media, where jealousy and rivalry turn dangerous.

The case of a woman found dead in a luxury car. Detectives delved into the competitive fitness industry, exposing a secret world of muscles, egos and illicit love affairs

A case in which the discovery of a woman's body by a pair of hikers prompted some to suspect the victim's camping friends of murder. Digging deeper, detectives unearthed a tale of rage-filled jealousy, unrequited love and a deadly predator

John Walsh reports on a man who allegedly stabbed a fellow university student to death in 2005. Plus, the hunt for a man who reportedly shot his room-mate in cold blood

The cases of Salvador Garcia Jr and Brian Freeman. Garcia Jr appeared on local news when his girlfriend Karen vanished, while Freeman allegedly killed his fiancee

The murder of 19-year-old Sonya Ivanoff, found shot near the remote village of Nome, Alaska, in August 2003. Detectives relied on forensic science to catch her killer