"Yesterday, Jason Servis, a trainer we have used for five years was indicted on multiple charges regarding using an illegal substance in horses. This news is extremely disturbing and disappointing," Maximum Security owner Gary West said in a statement.
According to U.S. prosecutors, Servis covertly administered performance-enhancing drugs to Maximum Security and "virtually all of the racehorses under his control."
Maximum Security, who last month won the $20 million Saudi Cup, finished first in the 2019 Kentucky Derby but was later disqualified for interference. West filed an appeal but it was denied by the Kentucky Horse Racing Commission.
Baffert is one of the horse racing's most celebrated trainers and has trained Triple Crown winners American Pharoah (2015) and Justify (2018).
(Reporting by Frank Pingue in Toronto; Editing by Lisa Shumaker)