Trump once hired Rex Heuermann’s architectural firm to do some work on one of his buildings. Rex Heuermann’s was later found out to be the Gilgo Beach serial killer.
I have to give Trump the benefit of the doubt on this one because maybe Heuermann tricked Trump. Maybe when Trump asked Heuermann if the buildings he deigned were popular - Heuermann said - yes they are very popular and people are dying to get in.