Cody Wilson, from Austin, landed in Houston Saturday night after he was arrested and deported from Taiwan.
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Overnight, Eyewitness News was in probable cause court as Wilson went before a judge.
Wilson, who created blueprints for 3D-printed guns, is accused of sexually assaulting a 16-year-old girl in Austin. Travis County had a warrant out for his arrest.
The teen told police Wilson paid her $500 after the encounter, then dropped her off at a Whataburger restaurant.
Earlier this year, Wilson made headlines for wanting to release 3-D gun blueprints over the internet through his Austin-based company.
Wilson's bond was set at $150,000.
It's unclear when he will make his way to Austin to face criminal charges.