It appears that you stand to receive a valuable benefit as an LPR in the U.S. It is true that some employers do not keep their end of the contractual obligation thus leaving you with very few choices:
1. Terminate the employment,
2. Lose the LPR benefit, as a result upon loss of the employment,
3. Attempt to find a similar position under the circumstances.
The State of California criminal case resulted in an imposed sentence, which should be reviewed by an experienced state licensed counsel for any habeas corpus issues that may indicate prior procedural or constitutional mistakes. Without that review no one on Avvo could opine on the chances to reduce that sentence .
Before you leave the U.S. contact the Court of the Criminal Court where the DUI case was adjudicated, according to you, and obtain a final Criminal case disposition then show that record to a practicing immigration assessment for further review whether anything needs to be done at present.
You must not only to do the right thing, but also, protect your legal interests as you may be personally charged with obstruction of justice yourself and a false report. Retain a criminal counsel licensed in California and discuss a proper way to address the issues you have described.
Actually, certain prior Illinois felonies, including some perjuries and fraud ones, may be expunged as of January 1, 2014 in Illinois. Obtain the exact criminal court disposition from the Clerk of the Criminal Court in the county where you criminal case was adjudicated and your "rap sheet" or criminal history, as conventionally known from your local police department Records Division and present these documents for a personal review by an experienced criminal defense counsel licensed in Illinois.
There are several potentially sound legal remedies available, such as fling Motion to Compel, a possible argument for obstruction of justice, mistrial and other legal venues which cannot be properly assessed online by random attorneys who know nothing about your particular criminal case.
The best person to make such decision is your counsel of record.
Such legally desirous effect should be assessed by an experienced California licensed counsel familiar with local court and its prosecution after reviewing your entire case, its evidence, notes and memoranda for such possibility.
These are very, very serious considerations and you will not be able to correctly form an educated decision based on the case details on Avvo.
Another considerably vital thing would be that only a competent legal counsel could evaluate plausible legal grounds for that action.
You father is removed from the U.S. as a result of a very serious aggravated felony for the immigration purposes. Also, this case presents a considerable discussion under the premises of Padilla v. Kentucky for his criminal case.
One thing is certain, you need to assemble all relevant criminal case and immigration case documents and present them for an assessment in person for an experienced immigration counsel. There is no way you would be able to resolve it in several Avvo paragraphs, that...