I unfortunately did not get the certification because the course was cancelled, but I did get training on interrogation from those who were certified. There was then (and still is) a great debate over who should be allowed to be trained as interrogators. JAG offices get in a panic whenever this issue comes up due to legal interpretations that if you are trained as intelligence, or MP, you are not allowed to do training for R2I, nor to instruct in because you will be 'tainted'. However, there is still a demand for combat arms and air crews to be trained in this area in case they get captured.
(Dont blame me, I didnt make this up!; It makes as much sense as saying that if a lawyer ever defended a crminal in court they should no longer be allowed to be a prosecutor because they are 'tainted'; or like a soldier being told they cant work on humanitarian aid missions because they've been trained to shoot people.)
On the reverse side, the argument goes that you can train front line soldiers to do interrogation, but cannot allow them to do so because they belong to units that may have encountered casualties or deaths due to contact with the enemy; the interrogators within the unit that sustained losses would lose their 'distance' (emotional detachment), which in turn reduces their ability to remain focused and unemotional during an interrogation of persons captured during said engagements. Further, said front-line interrogators may become casualties themselves or would have to be pulled off the front lines to conduct the interrogations.
Its a nasty catch-22.