It is worth mentioning as a preliminary caveat that there is a great deal of suspicion of Ingram and his allegations. This suspicion is particularly acute amongst republicans, and even more so amongst republicans supportive of Sinn Féin. This is because Ingram is frequently critical of the leadership Sinn Féin has given the republican movement. This criticism has become more vocal since the 2006 killing of British agent Denis Donaldson as a result of "Stormontgate". Republicans are also critical because Ingram's claims about the British Government involving themselves in the activities of Loyalist paramilitaries i.e., Collusion, have been quite common for many years, and something which the republican movement has sought to have investigated. The suspicion is that Ingram may be engaged in black propaganda, (sometimes called "Dirty Tricks"), self-promotion, or some other form of conspiracy aimed at damaging Sinn Féin and the wider republican movement.