Id Url Resource class Title Description Source https://policing.umhistorylabs.lsa.umich.edu/s/crackdowndetroit/item/6269 Harold Chapman Testimony-Pingree Trial Harold Chapman Testimony Summary, July 11 and 14, 1975, Pingree Street Conspiracy Trial-Recorders Court File #73-03636, Box 1, William Lucas Papers, Bentley Historical Library, University of Michigan