An arrest affidavit filed this week in Travis County said Wilson, 30, had sex with a girl under the age of 17 on August 15 at the Archer Hotel in Austin and paid her $500.
Cody Wilson, 30, was taken to immigration authorities in the capital by officers from Taiwan's Criminal Investigation Bureau, according to officials. Police allege in an affidavit filed September 19, that Wilson had sex with an underage girl and paid her $500 afterward.
Austin Police said that 3D-printed gun blueprint distributor Cody Wilson cancelled his flight back to the US from Taiwan after learning the 16-year-old girl he allegedly paid to have sex with spoke to police.
The victim disclosed the details about the incident to a counselor, who informed Austin police.
According to Apple Daily, Taiwan's National Immigration Agency (NIA) says that Wilson arrived in the country on September 6th on EVA Air Flight BR11, telling the Agency that he was in the country for business.
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.
Taiwan and the United States don't have an official extradition treaty, however, the U.S. Marshal Service released a statement saying they are "fully engaged with our global partners on this matter". Liberty Times notes Wilson did not have any contraband on him at the time of the arrest, and he appeared calm when approached by authorities.
Wilson runs Defense Distributed, a company that deals in software and hardware to facilitate home weapon printing and machining. And, in one message, Sanjuro identified himself as Cody Wilson, police said. The girl told investigators that Wilson paid her $500 after they had sex and then dropped her off at a Whataburger restaurant.
ABC News' attempts to reach Wilson have been unsuccessful. The crime is a second-degree felony, punishable by up to 20 years in prison.
In 2013, he successfully fired a bullet from the world's first 3D-printed handgun and posted its design online.
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.