NEW YORK--(BUSINESS WIRE)--Wall Street private investigations firm First Advantage BackTrack Reports LLC has seen a vast increase in its private equity investigations in 2015. In Q1, the firm initiated four times as many reports on PE funds for various clients as it had in Q1 of 2014. BackTrack, which for years has specialized in conducting background checks on hedge fund managers for institutional investors, began seeing an increase in interest from clients towards the end of 2014 and this swe