Bob Pockrass, Scenedaily

In a brief filed in U.S. District Court on Monday night, NASCAR contends that a test of Jeremy Mayfield’s urine samples at a second laboratory proved that the suspended owner/driver had an illegal drug in his system.

Mayfield and NASCAR are scheduled to be in U.S. District Court in Charlotte on Wednesday for the hearing on Mayfield's request for an injunction seeking to stop the sanctioning body from suspending him until the driver's suit can be heard by the court. NASCAR filed its brief Monday night in response to Mayfield’s brief in support of the injunction request filed Thursday.