"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.