Ok. Then I believe that I have good news for you. Take a look at this link on the 7th page:
As you can see, the crime of simple assault (which I assume is similar to wounding) is not considered a crime involving moral turpitude. So you could answer honestly on the ESTA application that you have not been arrested for a crime involving moral turpitude. If an interview results, you should take with you certified copies of the police report and court disposition in order to present if asked in order to prove that it was a simple assault.
IF, it is determined that this crime is not akin to a simple assault and they say that you are inadmissible, then you would have to file for a B-2 visa which can be found here:
And you would need a 212(d)(3) waiver which can either be done by the immigration officer at the interview or after just on their computer (take a look at this link):
or on form I-192 which can be found at www.uscis.gov/forms. You can find more information here:
So apply for the ESTA as soon as possible. Even if you are approved for it, you should still travel with a set of certified copies of the police report and court disposition. If those are not available because the case is so old, then you will need something certified from the police and court that says so.
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