Here is a very moving,sad, but to the point of what was happening in Ireland.
http://www.watchmovieon.com/movies/fifty-dead-men-walking

Plot: Based on Martin McGartland's shocking real life story, Martin is a young lad from west Belfast in the late 1980s who is recruited by the British Police to spy on the IRA. He works his way up the ranks as a volunteer for the IRA whilst feeding information to his British handler and saving lives in the process; until one day he is exposed, captured and tortured to within an inch of his life. He escaped dramatically by throwing himself from a tower block window and is still in hiding today.