Through a FOIA request to the Dept. of Agriculture, I was able to confirm the following death in Maine last year. (Maine, of course, is a light racing state, with no flat tracks, one harness track, and a handful of county fairs.)
Spaghetti Eddie, Apr 30, Cumberland R – “comminuted fracture of LH pastern; euthanized approximately 30 minutes after incident”

The cruelty of forcing horses to perform at high speeds must be punished and stopped.