The University of Illinois says an investigation into the use of inflated grades in online law school marketing material has found inaccurate data posted for the four most recent classes.

The university said Wednesday that the ongoing investigation found inaccurate Law School Admissions Test and GPA scores posted in online student profiles for the classes of 2011 through 2014.

University spokesman Tom Hardy said that for 3 of those classes, inaccurate information was also forwarded to the American Bar Association and to ranking organizations, such as U.S. News & World Report.

University President Michael Hogan called the practice "absolutely unacceptable."

The university hired an outside law firm and a forensic data analysis company to investigate after receiving complaints and finding inaccurate data posted online for the class of 2014.