Susan Bauer is a show jumping horse trainer who reported to the police a killing of a horse she suspected, in part from the killer, Tibor Nichols, leaving the scene in a green jacket she saw shortly after. As the horse just recently exercised, the presumed death of colic was out of the question.
The horse, Mister Wickets, belonged to the daughter of Richard Brandson, who hired Nichols to kill Mister Wickets due to his poor performance. This led to Nichols’ frequent employer, Lyle Christopher, with a long history of horse killing cons and one murder of a con victim. (L&O: "Corpus Delicti")