John Edward Walsh, Jr. is an American television presenter, criminologist, victims' rights activist, and the host/creator of America's Most Wanted. He is known for his anti-crime activism, with which he became involved following the murder of his son, Adam, in 1981; in 2008, deceased serial killer Ottis Toole was officially named as Adam's killer. Walsh was part-owner of the now defunct National Museum of Crime and Punishment in Washington, D.C. He also anchored an investigative documentary series, The Hunt with John Walsh, which debuted on CNN in 2014.

America's Most Wanted is an American television program whose first run was produced by 20th Television, and second run is under the Fox Alternative Entertainment division of Fox Corporation. At the time of its cancellation by the Fox television network in June 2011, it was the longest-running program in the network's history, a mark since surpassed by The Simpsons, although the program was revived ten years later. The show started off as a half-hour program on February 7, 1988. In 1990, the show's format was changed from 30 minutes to 60 minutes. The show's format was reverted to 30 minutes in 1995, and then back to 60 minutes in 1996. A short-lived syndicated spinoff titled America's Most Wanted: Final Justice aired during the 1995–96 season.