Michael Alcazar, former NYPD detective and professor at John Jay College of Criminal Justice, joined Newsline with Brigitte Quinn to discuss security concerns surrounding the Columbia protests.

PHOTO: NYPD officers stand guard outside Columbia University on April 29, 2024 in New York City. Pro-Palestinian demonstrators marched as a 2 p.m. deadline to clear an encampment given to students by the university passed. (Michael M. Santiago/Getty Images)