Thanks for the replies. The reason I believed confiscation as a result of a DUI is due to the verbiage in the law where they specifically noted shall not "possess":
c) No person who:
(1) Is or has been under treatment or counseling for addiction to, abuse of, or dependence upon any dangerous, harmful, or detrimental drug, intoxicating compound as defined in section 712-1240, or intoxicating liquor;
(2) Has been acquitted of a crime on the grounds of mental disease, disorder, or defect pursuant to section 704-411; or
(3) Is or has been diagnosed as having a significant behavioral, emotional, or mental disorders as defined by the most current diagnostic manual of the American Psychiatric Association or for treatment for organic brain syndromes;
shall own, possess, or control any firearm or ammunition therefor, unless the person has been medically documented to be no longer adversely affected by the addiction, abuse, dependence, mental disease, disorder, or defect.