A pedophilia website operator has been arrested in the kidnapping of a 12-year-old California girl

Nathan Daniel Larson, 40, is facing multiple charges in two states after he was discovered with a 12-year-old girl whom he traveled across the country to kidnap, authorities say.

(CNN)A Virginia man authorities describe as a "White supremacist" and "an advocate for pedophilia" is facing charges in California and Colorado for traveling across the country to kidnap a 12-year-old girl, officials said Saturday.

Nathan Daniel Larson, 40, is in Denver County Jail on a misdemeanor charge and faces felony charges in California for the kidnapping that authorities say utilized such "sophisticated" grooming methods that they fear there may be more victims.
In a statement, the Fresno County Sheriff's Office said Larson operates a website "which encourages the raping of children and sharing of naked photos and video of children being raped."
    It is unclear if Larson, who is scheduled to appear in Denver County Court on December 24, has an attorney.

    Months of 'manipulation and grooming'

    Larson met the girl, who lives in Fresno, on social media in October, the sheriff's office said. Through two months of "manipulation and grooming," Larson convinced her to send him pornographic images of herself, the sheriff's statement said.
    Last week, he flew to Fresno and persuaded her to sneak out of her house around 2 a.m. Monday, the statement said, and then used a rideshare company to take her to the airport. Larson altered the girl's appearance with a long wig and told her to act as though she was disabled and unable to speak so that she would not speak with anyone while they boarded a plane, authorities said.
    Later Monday morning, law enforcement was notified the girl was missing. When detectives learned that Larson and the girl had boarded a plane to Washington, DC, with a layover in Denver, they contacted authorities there and asked them to check the airport for Larson, the sheriff's office said.
    A Denver police officer found and arrested Larson and FBI agents rescued the girl, who was uninjured, the sheriff's office said. They made arrangements for her to reunite with her family Monday evening.
    Larson now faces a misdemeanor charge in Denver of harboring a minor and is facing felony charges in Fresno County, California, for kidnapping, child abductio