Id Url Resource class Title Description Source https://policing.umhistorylabs.lsa.umich.edu/s/crackdowndetroit/item/6422 Commissioner John Nichols 1972 smaller version Commissioner John Nichols Press Conference, DPD Central Photo Bureau, 1972, Box 2, Folder: PR Files, Photographs, 1969-1970, Detroit Police Department Additional Papers (1965-1993), Burton Historical Collection, Detroit Public Library