In 1954, the National Association for Mental Health first issued the book "How To Recognize and Handle Abnormal People: A Manual for the Police Officer." Included were techniques on dealing with all kinds of "abnormal persons," from psychopaths, drug addicts, and the "mentally retarded" to civil protestors and those involved in family disturbances.
A selection of scans is below. And if you're not satisfied, you can purchase a copy of the 1975 edition on Amazon for the low price of $103.
(Print via Weird Universe)
