He starts out as the driver of a lord and takes over after his death. The guy was his mentor and taught him how to be sly and not gather attention (police). Hope it was helpful.

Frank Lucas was born September 9, 1930, in Lenoir County, North Carolina. He moved to Harlem in 1946, becoming the driver and protégé of gangster Ellsworth “Bumpy” Johnson.

When Johnson died in 1968, Lucas took over his heroin empire and expanded it during the drug-fueled period of the late 1960s and early 1970s.

Lucas was particularly known for the “Cadaver Connection.” Lucas smuggled huge amounts of undiluted heroin from Thailand into the U.S. in the coffins of fallen American servicemen.

By establishing his own drug connection in the jungles of Vietnam, he cut out the middleman and undercut the competition. Lucas claimed to have grossed $1 million a day, selling his “Blue Magic.”

Lucas also relied on a tightly controlled crew called “The Country Boys.” He preferred using relatives and men from his hometown in North Carolina because they were less likely to steal from him.

Lucas was depicted as an entrepreneur who broke through the racial barriers of traditional organized crime in the biopic American Gangster, released in theaters on November 2, 2007.

Lucas was arrested in 1975 and was soon facing up to 70 years in prison. He quickly turned into a government informant, most notably against the then-corrupt Special Investigations Unit of the NYPD. Out of 70 SIU officers, 52 were eventually either jailed or indicted.

“The only people I every ever informed on were them … cops who took my money,” Lucas insists. But prosecutors involved in the case, including Richard “Richie” Roberts, contradicts that.
Lucas’ sentence was reduced to five years. But when he got out, he was quickly arrested again for drug dealing, albeit on a much smaller scale. Lucas spent seven more years in prison, and when he got out in 1991, Roberts came to his financial aid.

Russell Crowe plays Roberts in the film, though the character is a composite of the many detectives and prosecutors who arrested and tried Lucas. Today, they are good friends. Roberts is Lucas’s defense attorney and the godfather to his 11-year-old son, whose education Roberts has paid for.

Lucas, who uses a wheelchair because of complications from a leg he broke in two places some time ago, lives with his wife and son in Newark, N.J. He supports a charity founded by his daughter, Yellow Brick Roads, that raises money for the children of incarcerated parents.

so thats the story of Frank Lucus.

-bio.com

He took over for his dead boss.