Trainer Stephen Mahon, who was banned in June for a period of four years for animal neglect, will be investigated by the Irish Horseracing Regulatory Board (IHRB) after allegedly interfering with the post-race sample collection of one of his former horses, the Racing Post reported on Sunday evening. Stormey (Ire) (September Storm {Ger}), a horse formerly trained by Mahon, ran third in the Tipperary Racecourse Beginners Chase. The incident took place at Tipperary and was reported to the stewards by IHRB veterinary assistant Avena O'Keeffe. She alleged that Mahon "was...