Matthew Muller, already serving a 40-year sentence in the Denise Huskins case, had been terrorizing the community for two decades before the widely known "American Nightmare" case, prosecutors said.

In addition to the "American Nightmare" case and another home invasion, Matthew Muller is now linked to a 1993 kidnapping and sexual assault case, along with two home invasions in 2009 and a 2015 home invasion and kidnapping case.

"American Nightmare" victims Denise Huskins and Aaron Quinn worked with two small-town law enforcement officials to get kidnapper Matthew Muller to confess to more cold case crimes.