nobody. >> nobody. >> reporte >> nobody checked anybody out. people were buying, spending millions -- >> 5, 10, 20 units at a time. the money would go to ventura. >> reporter: if you want to know about the flow of dirty money through panama, monty freezener is the man to ask. in 1992, he was convicted in federal court of 20 counts of money laundering and fraud. he still knows all the players and all the plays. >> do you think it's possible trump didn't know the kind of people buying in his building? >> he didn't know. >> reporter: how could he not have known? >> because you don't walk up to somebody, hey, are you russian mafia? >> reporter: is it fair to say trump didn't ask because he didn't want to know. >> would you want to know? >> reporter: i would want to know who's buying a building with my name on it. >> because it's you. most, no. they don't care. >> reporter: a team from global witness, an anti-corruption watchdog often critic al of businesses and their connections to government officials spent