America's Most Wanted is an American television program that was produced by 20th Television. 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 long-running animated sitcom, The Simpsons. 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, to 60 minutes in 1996. A short-lived syndicated spinoff titled America's Most Wanted: Final Justice aired from 1995 to 1996. The following September, the show's host, John Walsh, announced that it would resume later that year on the cable network Lifetime. After a brief run on Lifetime, however, on March 28, 2013 the show was canceled again. This was reportedly due to low ratings and the level of royalty payments to Fox which holds the trademark and copyright. It was succeeded by John Walsh Investigates, a one-off special on Lifetime.