. In one of the locations we attended, I saw this man that I know (we'll call him John). My group and I have received reliable information that a specific section of the location we were at is dedicated to illegal activities (prostitution via trafficking, etc). John was in said location. At the time that I confronted him, there was no one else in the location, although it was implied that he was waiting for a girl to arrive (we have seen this happen many times before). I explained what I was doing there, to which John got very uncomfortable and angry and told me to never tell anyone I saw him there. I did not witness him doing anything illegal, and even gave him opportunity to explain himself. However, instead, John got angry, which tells me that he was likely engaging in the kind of activity I thought he was. This is not grounds to alert the authorities because I do not have incriminating evidence, I just have what I know based on the multiple other eyewitness encounters my group and I have had.