It is possible that there is a warrant. IT could have a county radius or a statewide pick up radius. Depending on your age the rest of your life could be a long time to think about this case in the back of your mind. There are some possible legal arguments regarding further punishment both for and against. You should consult with an attorney familiar with that jurisdiction.
Additionally currently people with this many DUI convictions face a lifetime revocation. If the law ever changes and becomes more lenient an open case could hold you back from getting a license.
You probably have a warrant.
Sal Sheikh practices law in Illinois.This answer is provided solely for informational purposes only. You should always speak directly with a lawyer in your State. It is difficult to evaluate your legal problem without a consultation and review of all the facts and documents at issue. This answer does not constitute legal advice, create an attorney-client relationship, or constitute attorney advertising.
If you are on parole you must have just gotten out of IDOC. They typically check an inmate for any detainers (warrants/holds). You may have none, but a simple call to the Sheriff's office in the county where #4 occurred will give you the answer for sure. You can also go to the Clerk of the Circuit Court to review the court file and find out what happened in your absence. You may not only have been tried and convicted in absentia but also sentenced in absentia.
This answer is provided for informational purposes only and does not create an attorney-client relationship. Follow-up with a licensed attorney who regularly practices in this field is strongly recommended.