The local anesthetic was found in an amount that exceeded the allowable legal threshold in a test sample taken from a horse in Mitchell's care that raced at Del Mar on Aug. 3, a CHRB statement said. The finding was made by the Maddy Laboratory at the University of California-Davis, and confirmed by Truesdail Laboratories. The horse, Scat Thief, finished third in the seventh race.
According to the CHRB, procaine is found in procaine penicillin G, a commonly administered antibiotic. For this reason, procaine is a Class 3 violation rather than a Class 2 transgression, as are most other anesthetics.