Aren't you worried about your story not quite coming through because you're speaking through someone else?
It sounds like a bad idea all around.
I'm more concerned that the persecution, understanding how stressful the situation is for me and how not being a native speaker I wouldn't necessarily be familiar with legalese or very formal lexicon, uses it against me to extract a confession due to my confusion, than I am that the nuances would be lost through an interpreter.