New York police are investigating a possible hate crime at Columbia University Tuesday after a hangman's noose was tied to the door of a black professor at Columbia's Teachers College. The noose was discovered on the door of Teachers College professor Dr. Madonna Constantine, shortly before 10 a.m. Tuesday, according to WABC. Constantine is a professor of psychology and education and is the director of the Cultural Winter Roundtable in psychology and education at the Teachers College. She...Full Story