Former Ohio State linebacker Thaddeus Gibson didn't understand why his purchase of a used Chrysler 300C was listed at $0 in documents disclosed in a media report, since he was still making payments on the vehicle.

Now, newly uncovered documents appear to back up Gibson -- to the tune of $13,700.

In an initial report on Ohio State's investigation of car sales to athletes and their families, The Columbus Dispatch cited documents showing a purchase price of $0 for Gibson's car.

But on Wednesday, the newspaper reported it obtained a previous title on the vehicle listing the purchase price as $13,700 for a sale dated June 27, 2007 and financed through Huntington National Bank.

The title listing the purchase price as $0 was dated March 6, 2008 and listed the same bank as the lender, according to the report.

Ohio State's compliance department is reviewing the sales of more than 50 cars to student-athletes and their families to make sure the sales meet NCAA rules.

The Dispatch reported that a car salesman who received game passes from Ohio State athletes handled many of the deals at two different dealerships. Ohio State has since taken the salesman, Aaron Kniffin, off the pass list.

Athletes are prevented from receiving special deals not available to other students and are not permitted to trade autographs for discounts. Both dealerships display signed Ohio State memorabilia in their showrooms.

School officials have seen no evidence of players getting special treatment in vehicle sales, Douglas Archie, associate athletic director for compliance, said in a statement Saturday.