By CBS4 Newsroom
A University of Iowa athletic advisor who resigned this week was accused of trading football tickets and money for sexual favors.
Documents from an internal investigation by the university's human resources and employment offices show that Peter Gray had a history of inappropriate behavior.
The documents allege that Gray made sexual comments to recruits and their parents, and inappropriately touched a student.
One student told investigators Gray exchanged money and football tickets for sex with someone unaffiliated with the university.