Strange case of Kentucky vet

The case of Dr. Rodney Stewart is a strange case. The vet has been suspended five years after cobra venom was found in Patrick Biancone's barn at Keeneland. Is this a case of an innocent vet taking the fall for a crooked trainer or does it go deeper than that? Biancone has a history of drug violations in every jusrisdiction he has raced. Stewart is a respected vet. Stewart at the time also treated harness horses. Cobra venom was okayed for use on harness horses in Kentucky. Stewart was suspended for possession of a drug that is harmful to horses. Apparently it is harmful to thoroughbreds and not to harness horses. For a drug that was not physically in his possession at the time of the incident. I just don't understand this case at all. Biancone was suspended for a short time and is back training in Southern California.   I just don't understand this case at all.