resigned, over claims he didn t sufficiently address racism on campus, and after members of the football team said they wouldn t play until the president was out. we reported here yesterday, in one posting, police say park wrote online, and i quote, some of you are all right. don t go to campus tomorrow. the associated press reports the investigators asked the students where that was based on a threat posted before the shooting at umpqua community college. the student responded, uh-huh. then they asked, why? and he said, i don t know. i just deep interest. i mentioned the arrest happened days after missouri s president stepped down. students protested, saying he didn t address incidents of racism on campus. now we re seeing similar demonstrations in schools across the country. trace gallagher has more. mizzou just named on interim