Someone with a background in physics is going to determine the only plausible locations where Rey fell or was thrown off the building. It's disappointing that the Baltimore PD didn't bring in a physicist to do that analysis initially

My crazy theory is that the Russian mafia was involved. His friend/employer was fined $1.5 million by the SEC for misleading investors about a Russian mining operation. The Russian mafia is brutal and it would explain why his friend has remained silent all these years, as he would fear for his life.