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==Louisiana state police superintendent==

==Louisiana state police superintendent==

Grevemberg was appointed in May 1952 to head the state police, based in [[Baton Rouge]], by newly elected Governor [[Robert F. Kennon]]. Grevemberg's autobiography, ''My Wars: Nazis, Mobsters, Gambling and Corruption,''<ref>([[Lafayette]], Louisiana: Beau Bayou, 2004), ISBN 0-935619-01-1, ISBN 978-0-935619-01-0.</ref> tells about his experiences with the [[Mafia]], which he said tried to kill him and bribe him and to kidnap his sons. The mob sent him a death-threat letter. Illegal gambling had existed in Louisiana for a century, and the mob began operating there during the administration of Governor [[Huey Long|Huey Pierce Long, Jr.]], when [[New York City]] mobster Frank Costello (1891-1973) brought slot machines into the state. Grevemberg's book chronicles his fight against gambling and vice. Slot machines and casino devices, illegal in Louisiana at the time, were operated by the [[Mafia]] and other criminal elements.​

Grevemberg was appointed in May 1952 to head the state police, based in [[Baton Rouge]], by newly elected Governor [[Robert F. Kennon]]. Grevemberg's autobiography, ''My Wars: Nazis, Mobsters, Gambling and Corruption,''<ref>([[Lafayette]], Louisiana: Beau Bayou Press, 2004) ISBN 0-935619-01-1, ISBN 978-0-935619-01-0.</ref> tells about his experiences with the [[Mafia]], which he said tried to kill him and bribe him and to kidnap his sons. The mob sent him a death-threat letter. Illegal gambling had existed in Louisiana for a century, and the mob began operating there during the administration of Governor [[Huey Long|Huey Pierce Long, Jr.]], when [[New York City]] mobster Frank Costello (1891-1973) brought slot machines into the state. Grevemberg's book chronicles his fight against gambling and vice. Slot machines and casino devices, illegal in Louisiana at the time, were operated by the [[Mafia]] and other criminal elements.​

Grevemberg defied the opposition and conducted more than one thousand lightning raids that shut down much of the illegal gambling. Most of the gamblers then moved to [[Nevada]]. He destroyed 8,229 slot machines. Grevemberg vastly reduced the amount of narcotics sold on Louisiana streets, dismantled an eight-state sexual slavery ring, and modernized the Louisiana state police into a premier law-enforcement agency.<ref name=obit/>​

Grevemberg defied the opposition and conducted more than one thousand lightning raids that shut down much of the illegal gambling. Most of the gamblers then moved to [[Nevada]]. He destroyed 8,229 slot machines. Grevemberg vastly reduced the amount of narcotics sold on Louisiana streets, dismantled an eight-state sexual slavery ring, and modernized the Louisiana state police into a premier law-enforcement agency.<ref name=obit/>​