By the letter of the law , referee Maurice Deegan had little option but to send him off .
Then came that decisive moment when Cassidy was red - carded just before half - time for striking out at Kieran O'Leary of Dr. Crokes .
By the letter of the law , referee Maurice Deegan had little option but to send Dr. Crokes off .
Then came that decisive moment when Cassidy was red - carded just before half - time for striking out at Kieran O'Leary of Dr. Crokes .