If you have never been in the system, there are a few programs that may be offered to divert you away from being adjudicated.
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Yes, he may be able to get him into a diversionary program.
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They may decide to incarcerate right there depending on the violations.
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It does not sound like you are a felon. I think it will depend on Guatemala more than being allowed to leave the country.
As a former prosecutor, I would not be inclined to completely drop the case, but would be highly motivated to resolve the matter without litigation. I tend to think most prosecutors would like to see something, even if it is downgraded to a misdemeanor theft.
I might also try to get her email to prove you have attempted to contact her. And of course be pleasant, she may be out on leave, or sick for some reason.
They will not "add up" to that score, but one may be sentenced consecutively on some of the charges.