Former rugby international Brendan Mullin stood with his hands behind him as he prepared to receive his sentence. His hands fluttered behind his back, but his face was stoic as sentencing began. Judge Martin Nolan said that “unfortunately the offending behaviour was very serious” he had no choice but to give him a custodial sentence.  Judge Nolan sentenced Mullin to three years, starting today, for stealing more than €500,000 from the Bank of Ireland. Mullin had denied all charges against him, but a jury returned guilty verdicts in 12 of the 14 charges against him. Judge Nolan said he accepted…