Bob Baffert is back at the Kentucky Derby for the first time in four years, having served his punishment for Medina Spirit’s failed drug test and coming to the place where he’s won a record-tying six times.

The story of Bob Baffert is not a tale of a singular sinner, but instead a parable for a sport struggling to explain its welfare and medication practices to an American public that increasingly disapproves of it.

His three-year suspension from Churchill Downs is over, but the 72-year-old remains unapologetic about his actions. Here’s a short list of his long record of transgressions.