"but what happens"

The fear here (which isn't really detailed in the post because the OP has some experience in this area) is always going to be that you will say the wrong thing and somehow disadvantage yourself. If the respondent goes along and is willing to cooperate that won't happen. But if they don't there may be some nuggets in whatever you say that will come back to haunt you (just like talking to the police w/o an attorney might).