The show's most spectacular success was the case of John List, a man who murdered his entire family in cold blood nearly twenty years earlier and was never caught. Using the standard dramatization and an amazingly accurate forensic sculpture to account for his age since his last known photograph, the show was instrumental in the identification and capture of the fugitive within one week of broadcasting the segment. List was captured on June 1, 1989 after having lived under the pseudonym Robert Clark in Denver, Colorado and Midlothian, Virginia. On April 12, 1990, he was convicted in a New Jersey court of five counts of first-degree murder and was sentenced to five life terms in prison. On March 21, 2008 List died at age 82 in a Trenton, New Jersey prison from complications of pneumonia.
The Fox network cancelled the show in 1996, but reversed the decision because of a public outcry from viewers, politicians, and law enforcement agencies. The series was off the air for six weeks before it was finally reinstated.