Analysis of information sources in references of the Wikipedia article "Clifford Davis (politician)" in English language version.
Crump put Ku Klux Klan leader Cliff Davis in charge of the police and then made him a congressman for thirteen terms.
...Crump generally had racist views toward black Americans. He allowed police brutality against black citizens to go unchecked. During the 1920s, Ku Klux Klan member Clifford Davis served as police commissioner, and almost 70 percent of the force were Klan members.