09:22 AM ET 09.09 | The Duke men's basketball team's squeaky-clean image has come under question, and its 2010 national title could be in danger, too. Former Blue Devils' forward Lance Thomas, a New Jersey product from St. Benedict's Prep who played for local AAU giant New Heights, is being sued for the balance of nearly $100,000 worth of jewelry purchased from a prestigious New York company in December 2009, according to the Associated Press. The case was filed in Dallas in January, but wasn't made public. Thomas, a starter on Duke's 2010 national championship team, reportedly made a $30,000 down payment on the purchase at Rafaello and Co., a New York firm known to cater to professional athletes. The question is whether the purchase violates NCAA rules and puts the Blue Devils' title in jeopardy. The AP reported there was an agreement between Thomas and Rafaello & Co. giving him credit to pay the remaining $67,800 within 15 days.NCAA spokesman Stacy Osburn told the AP the NCAA is speaking with Duke about the matter. NCAA rules prohibit athletes accepting benefits that aren't available to all students. Osburn said a violation comes down to whether "the general student body, or someone similarly situated, would be able to get the same benefit or treatment."