On 10 July 2012, Branch was arrested by officers of the Serious Organised Crime Agency.
Prior to closure, the non-executive directors were Peter Clarke, Sue Garrard, Francis Plowden and Dr Martyn Thomas.
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Earlier in his career he was head of the Northern Ireland anti-terrorist intelligence unit in Belfast, then Deputy Director General (with the rank of Deputy Chief Constable) of the National Crime Squad, which in April 2006, merged into the Serious Organised Crime Agency.