"According to the Toronto Star, Mourad Boudra was pronounced dead on the scene by paramedics after suffering head injuries when the horse he was on collapsed and fell on top of him. The horse was a 3-year-old Ontario-bred filly by Mobil named Tawney’s Wish that had one career start last month. Various reports said it appeared the horse suffered a heart attack and ran through a fence."
http://www.paulickreport.com/news/th...xercise-rider/
From Global News:
This article claims the man was also a trainer.
http://globalnews.ca/news/1412238/ma...ine-racetrack/