it sounds like there were racial slurs yelled out even after the police arrived. It is a possibility it is a this was a poorly written article which is a distinct possibility.
"The latest trouble began, according to MU’s Legion of Black Collegians student organization, when a group of white students hurled racial slurs at two black students as they crossed paths in front of a fraternity house late Tuesday. That incident drew a crowd, police and allegedly more racial slurs shouted from the windows of the fraternity house."
Read more here:
http://www.kansascity.com/news/local/article104673026.html#storylink=cpy