Wilson had left for the Taiwanese capital after being tipped off by a friend of the victim that she had gone to police, Commander Troy Officer of the Austin Police Department's organized crime unit told reporters at a Wednesday press conference.
Following the charges being announced, authorities said Wednesday that Wilson, 30, had boarded a flight to Taipei and then canceled his return ticket.
Once Wilson was positively identified, the Criminal Investigation Bureau (CIB) informed the American Institute in Taiwan, a non-profit organization that is staffed primarily by US State Department employees and acts as a de facto embassy, as well as the Federal Bureau of Investigation, Immigration and Customs Enforcement, and other US law enforcement agencies.
After he signed up to rent an apartment for six months, police located him and picked him up at a modest hotel in Taipei City's Wanhua District Friday evening.
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 USA accordingly. A U.S. District Judge, concerned about national security, agreed.and extended a temporary restraining order until the case is resolved.
Cody Wilson has been accused of having sex with an underage girl and paying her $500 afterward in Texas.
Cody Wilson, 3D-printed firearm pioneer and DarkWallet developer, has been arrested in Taiwan in connection with charges that he sexually assaulted a minor in Texas.
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After the police confirmed that Wilson was present, he was placed under arrest at 6 PM local time.
Wilson faces up to 20 years in prison.
Wilson - who subscribes to an anarchist philosophy that the free exchange of ideas on the internet is a check on government - then said he interpreted the ruling as only barring the free online distribution of the blueprints, and began offering the files for sale.
A lawyer for Wilson did not immediately respond to a request for comment.
Wilson founded the group Defense Distributed, which has been selling 3-D firearm-design files on flash drives via regular mail after a USA federal judge barred the group from posting the blueprints online.
Police said they are aware that Wilson travels often for business, but that they do not know why he went to Taiwan.
Shortly after Wilson posted the blueprints online in 2013, the Obama administration ordered him to take them down.