NEW YORK ( CNN ) -- one professors , Three former one at Columbia University receive hate mail this week . African-American psychologist at Columbia University among those receiving swastika . In 2007 , same psychologist 's office door was spray-painted with a swastika . Teachers College is leading investigation ; no arrests made .
one professors , Three former one at Columbia University receive hate mail this week . African-American psychologist at Columbia University among those receiving swastika . In 2007 , same psychologist 's office door was spray-painted with a swastika . Teachers College is leading investigation ; no arrests made .