The facts are the RUC and the British colluded with Protestant para-militaries and set up Nationalists to be murdered, when British police were sent over to investigate they met with a "wall of silence",.
John Stalker not only got the runaround from the RUC and the Brits, but was set-up and lost his job, Stevens had the same problem.

The plain and simple facts are, there was wide spread collusion by an established government.