If you have a criminal record, however minor, don't leave the U.S. but consult an immigration attorney
Different offenses may have different immigration consequences. LPRs may be removable or inadmissible for crimes involving moral turpitude, aggravated felonies, domestic violence, firearms, controlled substance and other offenses. Do not assume that a minor incident does not have immigration consequences. For example, certain misdemeanor offenses can be classified as an aggravated felony for immigration purposes. Even if an offense is not considered a conviction under state law, it may still be a conviction for federal immigration purposes. If you have ever been arrested for any reason, consult with an experienced and reputable immigration attorney.
Gather documents for attorney review
Gather all arrest records, indictments or criminal information (the criminal charging documents), plea records, sentencing records and certified records of conviction for each and every arrest. Only by reviewing these, together with the actual statutes under which you were convicted, can an attorney begin to analyze whether the record will subject you to immigration detention.