On the Case with Paula Zahn is an American documentary and news program broadcast on Investigation Discovery since October 18, 2009. The program explores in-depth stories of crime mysteries and interviews with involved individuals, closest to the cases and includes expert analysis. Emmy Award winning journalist and former CNN anchor Paula Zahn is the program host who travels throughout the country interviewing people directly affected by the tragic cases.

Paula Ann Zahn is an American journalist and newscaster who has been an anchor at ABC News, CBS News, Fox News, and CNN. She currently produces and hosts the true crime documentary series On the Case with Paula Zahn on the Investigation Discovery channel.