Cody Wilson, the Texas man behind the controversial 3-D printed gun, is accused of sexually assaulting a juvenile female, according to a police affidavit obtained by Fox News.

Austin police said they conducted a forensic interview in late August with a juvenile who said she was sexually assaulted by Wilson after meeting him on a website called SugarDaddyMeet.com, the affidavit stated.

Wilson had not been arrested in connection with the accusation as of Wednesday afternoon. Austin police Cmdr. Troy Officer told The Associated Press that the department is working with national and international law enforcement to locate Wilson, who missed a scheduled flight back to the U.S. from Taiwan. Officer said that a friend of the girl told Wilson before he left for Taiwan that police were investigating the allegation against him.

The juvenile told police she connected with a person using the profile name “Sanjuro,” and who identified himself as “Cody Wilson.” She told police Wilson told her he was “a big deal,” according to the police documents.

The affidavit does not specify the victim’s age, only identifying her as a “juvenile female under the age of 17.” Officer told the AP that the girl is 16 years old.

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"My detectives have interviewed ... this victim," Officer said. "In their opinion, if someone mistakes her age it would be because they think she's younger, not older ..."

During the forensic interview, the victim told police she and Wilson exchanged cell phone numbers and continued to have conversations using the Apple iMessage service on her phone. They allegedly arranged to meet Aug. 15, 2018 at the parking lot of Bennu Coffee in Austin.

The girl reported she received images of Wilson's genitalia and sent a picture of herself naked, according to the affidavit.

Court documents state Wilson showed up to the parking lot in a black Ford Edge sports utility vehicle. Police said the license plate seen on surveillance video matches one of the vehicles registered to Wilson’s business, Defense Distributed.

The victim told police she entered the vehicle and they drove to the Archer Hotel. Surveillance cameras reportedly captured the two using the hotel’s valet service, in the lobby and in an elevator. They were also allegedly spotted on the seventh floor where there were guest rooms.

The juvenile told police the two went to room 718, where Wilson allegedly sexually assaulted her. Afterward, she said, he paid her $500 before driving her to a Whataburger restaurant.

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Hotel records revealed that Wilson registered the same room that the girl reported he had sex with her, the affidavit stated.

Wilson made headlines this summer for defying a federal court order and selling blueprints of untraceable 3-D printed guns. He told Fox News in July the guns are “mostly curiosities” and that the “big” and “bulky” characteristics of the weapons would help identify them.

“I doubt seriously that it’s a real problem,” he added. “If it is a problem, then the [security] norms will have to change.”

Fox News’ Christopher Carbone and The Associated Press contributed to this report.