New York police detectives are reviewing surveillance video from Columbia University in hopes of identifying the person or persons who hung a noose on a professor's office door earlier in the week. The noose was found Tuesday, hanging from a door at Columbia's Teachers College. "NYPD detectives began to download videotape images from security cameras on the campus ... after serving a subpoena on campus officials who declined to release the material without one," Deputy Commissioner Paul J. Browne said in a statement Thursday.
Investigators said they have about 56 hours of video they want to review from Tuesday's incident, which is being investigated as a hate crime. According to police, no arrests have been made and no suspects have been identified. The noose was described as being made of twine rope three-quarters of an inch in diameter. The apparent target was Madonna Constantine, 44, an African-American professor of psychology and education at the Teachers College.