‘On The Case With Paula Zahn’ Preview Sunday On Investigation Discovery

New Episodes Premieres Sundays at 10/9c

ON THE CASE WITH PAULA ZAHN takes viewers on an exciting journey inside the most fascinating crime and mystery investigations. First person accounts, along with insight from experts are featured as each case reaches its dramatic conclusion.

· A Test of Patience premieres Sunday, August 9 at 10/9c The unsolved murder of a teenager torments a small midwestern city for decades until a relentless team of investigators finally finds the clue that breaks the case wide open.