Weber County Attorney Dee Smith told ABC4 Monday he filed the charges against Gregory Seamons on Friday. Smith says DNA evidence taken from the 1983 murder investigation was a perfect match to Seamons' DNA.
Lemberger disappeared after walking to school on March 2, 1983 and a group of young boys found her body the next day hidden in a field.
Seamons continues to say he never knew Lemberger and has nothing to do with the crime, but investigators believe that as a 15-year-old he raped and beat the 11-year-old.
The Idaho Department of Correction website says Seamons is an inmate whose sentence for a 2nd degree kidnapping conviction is set to expire in 2017.