In 1994, in an odd move completely out of procedure and character all the main counter insurgency personnel from the RUC and other agencies in Northern Ireland were loaded into a chopper for a meeting in Scotland. In a crash similar to that of seal team 6, all hands were lost.
Less than three years later Common Purpose were introduced into Belfast and the whole direction of governance changed.
23 years later those cops are being accused of collusion, in a one sided trial.
There are some conspiracies surrounding this.
This is the best summation.