During World War II, Williams was integral in the training of thousands of American hopeful would-be undercover operatives and guerrilla fighters in both the Military Intelligence Division and the Office of Strategic Services.

In 1930, Williams was one of the first agents to join the newly established Federal Bureau of Narcotics (FBN), a predecessor agency of the Drug Enforcement Administration (DEA), where he became a life-long devotee.

[2][3] While at the Bureau of Narcotics, Williams worked with men like "Charlie Cigars" and George Hunter White under the famous FBN Commissioner Harry J. Anslinger to take down massive criminal networks.

[3][2] Historian John C. McWilliams said "He was likely the first FBN agent to use dogs - German shepherds and fox terriers to sniff out contraband drugs.

"[3][2] During the majority of his 24 years at the Bureau, Williams was a District Supervisor (DS), equivalent to what today would be called a Special Agent in Charge (SAC) in the DEA.

[5] The recruits that Williams taught here were between 22 and 33, had at least a high school diploma, had completed basic military training, and usually were affiliated with law enforcement in some form.

[8] There, he learned the British methods of sabotage, reconnaissance, guerrilla warfare, underwater and amphibious assault, trailing suspects, and managing networks.

[1] Williams' work with the FBN immediately resumed to full-time status when the OSS was shuttered, and Anslinger gave him and George Hunter White the assignment to track down and bring to justice Lucky Luciano - the Italian Chicago mob boss that the OSS and the Office of Naval Intelligence (ONI) had heavily depended on to guarantee safety of shipbuilding in Chicago and New York.

[2][3][12] ONI and OSS during the war had also used Luciano as an asset to ensure protection of American forces by the Italian criminal underworld as they invaded the country and advanced northward against the Germans.

"[12] Williams charged that three months after Luciano's return [to Italy] from Cuba in 1947, the first large shipment of heroin, worth $250,000, was smuggled into the United States.

-- The Luciano Story[12] Williams and White chased down the mob all around the world for Anslinger, sending reports from London, Paris, Iran, Ankara, Tehran, Athens, Baghdad, Beijing, and many more.

[15] While working under the direction of the Central Intelligence Agency and General MacArthur, Williams and other CIA field men allegedly issued orders to their soldiers to "prove victory by turning in the enemy's ear.

"[16] One of the men that Williams worked with in the field was named Anthony Poshepny, who became the prototype for Lt. Kurtz in Apocalypse Now, a rogue CIA agent who embraced the dark side.