It started with a doping scandal, a documentary error and a convoy of cars driving up to inspect the Co Wexford stables of respected horse trainer Liz Doyle, daughter of former Fine Gael junior minister and MEP, Avril Doyle. The random search on March 26, 2014 was jointly led by Chris Gordon, head of security at the Turf Club, which regulated the sport, and the Special Investigations Unit of the Department of Agriculture.  Nothing untoward was found. Liz Doyle had done no wrong.  But what unfolded that day, and in the weeks that followed, would ricochet around the world of…