"Commissioner Johannes Spreen was a police officer extraordinary; a man who helped restructure and develop New York City Police Academy training leading to a college program, a 'West Point' for officers, now John Jay College for Criminal Justice. Johannes Spreen is a man of enthusiasm, indeed a prophet; always ahead of his time and brought his talent to Detroit as Police Commissioner and later Sheriff of Oakland County." Rudolph P. Blaum, Retired Captain, New York City Police Department, John Jay College, former president American Education Association.