He will be charged with everything they can think of. Made up stuff, real stuff from jaywalking to treason.
He will be facing 300 years possible sentence if convicted of even half of it.
He will be facing a 5 years incarceration just waiting for a trial.
They will offer a plea deal: plead to being a bad boy and you can go home tomorrow, wear a radio on your ankle for a year and that's it.
He will do the deal.
The US will get a conviction, which they will trumpet from the rooftops. They will have a precedent that they covet, and anyone running any similar operation will pretty well have to stop it, lest they meet with a much worse fate.
The American's, no doubt, believe they are doing this fella a favour, since their first instinct was to scoop him up into a black helicopter, or even just nuke him remotely while he rides his bike to school.