Columbia University has continued its heavy police presence ever since students began protesting at the school last week. While there have been clashes, Tarik Sheppard, NYPD deputy commissioner of public information, says for the most part things have been peaceful. He explains the types of resources being used to ensure the safety of those on campus and the department's effort to respect people's first amendment right without crimes being committed. #ColumbiaUniversity #NYPD #encampment