Mounted Policemen Keep Close ID: 3630 | This file appears in: Collinwood High School Riots Police kept a close eye on Collinwood High School after an intense episode that began on Tuesday 2 June 1969. A group of whites gathered at the Collinwood High School after classes had ended and began throwing rocks and bricks at cars with black passengers. Two days later, fistfights, beatings and vandalism at the high school resulted in the arrest of eleven people. Image Courtesy of Cleveland State University. Michael Schwartz Library. Special Collections. Download Original File "Mounted Policemen Keep Close" appears in: Collinwood High School Riots