that doesn't explain how they knew he would be there and their questions seems to be pre-prepared, once again if he was attending an event there should be more people around cause he was leaving, if he was leaving it means end of event, should be more people there, cars and such, not the case. those dudes recording were 1 - working for him for some reason 2 - working for someone else who provided information about his location and gave them those specific questions you can notice the dudes are nervous cause they don't introduce themselves, and even though they ask "you are you doing sir" they don't say good evening or anything likely which is weird for a matter of education in general and then one of them asks something very interesting after saying that his family started the federal reserve. he asks "you know the source of this information?" why would he be interested in such topic? well, anyway.
Brazil