Arthur Cheney Train,
Courts and Criminals
“ A private detective may, and usually does, become possessed of information even more valuable to the person who is being watched than to the person to whom he owes his allegiance. Unreliable rascals constantly sell out to the other side and play both ends against the middle. In this they resemble some of the famous diplomatic agents of history. And police detectives employed to run down criminals and protect society have been known instead to act as stalls for bank burglars and (for a consideration) to assist them to dispose of their booty and protect them from arrest and capture. ”
