Two winners and two second-place horses who subsequently tested positive for caffeine at Oaklawn Park back in February have been disqualified from their placings and purses, and the trainer of all four, Federico Villafranco, will be suspended for the first 30 days of the Oaklawn Park meet under the Arkansas Racing Commission (ARC)'s "absolute insurer" rule. Caffeine, a stimulant, is listed as a Class 2, Penalty Category B drug on the Uniform Classification Guidelines for Foreign Substances list published by the Association of Racing Commissioners International (ARCI). For a first-offense...