Two weeks after he drugged and kidnapped Denise Huskins from her Vallejo, California home in 2015, "American Nightmare" kidnapper Matthew Muller allegedly committed another crime in neighboring Contra Costa County.

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.

The announcement marks another stunning twist in the burgeoning number of alleged kidnappings, break-ins and rapes that Matthew Muller apparently confessed to in letters sent to a central