Your next step - should the case be dismissed - is to get an experienced immigration attorney. If you had done this before, based on the facts you have presented you probably woyuld not have been deported.
At a minimum, the bench warrant should have been quashed. It is unclear what the basis of dismissal is but there may be witness or evidentiary issues given the delay in prosecuting the case. However, given the deportation you may not legally be able to return to Las Vegas.
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You really need an immigration lawyer once the case is resolved, not another criminal defense lawyer.
It will largely depend on what the outcome of the case it. I'm not sure I follow what you wrote, but it would be difficult to dismiss it without your presence or compliance with probation -- I don't know how you can be in warrant for so long and get a dismissal.
Clark County, Nevada practitioner.