Austin police Detective Shaun Donovan wrote in a request for a warrant to arrest Wilson on a sexual assault charge.
Wilson owns the company Defense Distributed, which makes blueprints for untraceable 3D printed guns.
Taipei police reportedly handed Wilson over to the National Immigration Agency.
"Mr. Wilson is not in custody", Trey Officer of the Austin Police Department said Wednesday at a press conference. In an affidavit first obtained by KVUE, the victim claimed that she had met Wilson on the website SugarDaddyMeet.com, and law enforcement officials had confirmed the existence of surveillance footage capturing Wilson and the victim checking into an Austin, Texas, hotel together on August 15. The National Immigration Agency is now urging the American Institute in Taiwan to issue a valid travel document for Mr. Wilson, so he can be deported back to the US accordingly.
The girl, according to the affidavit, said they met in the parking lot of an Austin coffee shop before they drove to the hotel.
Taiwan does not have an extradition treaty with the USA, but local police have nevertheless cooperated with authorities in the U.S.to arrest Wilson, and - according to translated reports from Taiwanese media - potentially deport him to his home country. And, in one message, Sanjuro identified himself as Cody Wilson, police said. They said the vehicle was similar to a 2015 black Ford Edge registered with Wilson's business, Defense Distributed.
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A man, Collin Daniel Richards, was taken into custody, held on $5 million bond, and has been charged with first-degree murder. He was found with an illegally long knife during a traffic stop, and he injured a police officer during a scuffle.
Police said they reviewed hotel surveillance footage "showing the victim and Wilson exiting an elevator onto the seventh floor". He later dropped her off at a Whataburger restaurant, she told authorities.
ABC News' attempts to reach Wilson have been unsuccessful.
The US investigation into Wilson began after a counselor to whom the victim had spoken notified police "that a juvenile female under the age of 17 had reported having sexual contact with a 30-year-old male".
Wilson is a self-described "crypto-anarchist" at the center of a fierce legal battle over whether Americans should be able to print guns that would be unregulated and untraceable. The video got almost half a million views and the design was downloaded almost 100,000 times.
Years of litigation followed, leading to a settlement in July allowing Wilson to re-release the gun's downloadable blueprints.
The files could previously be downloaded for free, but a federal judge issued a nationwide injunction last month that blocked the posting of the blueprints online.