takes us to panama. >> reporter: this 70 story building, curved and lit up like a christmas tree, is unmistakable. this is the trump ocean club. we have spent months going over paperwork and talking to lawyers and, investigators and businessmen. we were trying to figure out who exactly was involved, the investors, brokers and who bought the apartments and hotel rooms. what we found out is that this building attracted enormous amounts of dirty money in particular from russia because of the name on the building, that name is trump. good evening. we're on assignment in panama city tonight. this is a notorious money laundering center.