Investigation Discovery +1 Wednesday

How an off-duty police officer chancing upon a minor theft jump-started an investigation into California's deadliest serial killers - Leonard Lake and Charles Ng

A case from 1994, when elementary school principal James Davis was found tied to a tree outside Oklahoma City, prompting a US-wide manhunt for Franklin Delano Floyd

The case of Californian couple Pegye and Eric Bechler. Pegye was murdered on a birthday cruise by her husband and evidence supplied by his mistress helped to secure his conviction

A case in which a body was discovered at the home of a white-collar worker, leaving detectives to determine whether it was murder or suicide

When the body of a young woman is discovered in the woods, investigators are faced with a difficult decision if they're to solve this hauntingly familiar murder

An active-duty soldier dies in a brutal attack during a night out with her unit. Police determine if a secret fear she told her mother is the motive for her murder