 The UVF Mid-Ulster Brigade was commanded by Robin "The Jackal" Jackson from 1975 to the early 1990s.Over 50 killings have been attributed to Jackson, according to David McKittrick in his book "Lost Lives", and he was allegedly an RUC Special Branch agent.Weir also claimed that Breen was fully aware of collusion between certain RUC officers and loyalist paramilitaries such as Jackson.