Racketeer (noun)

A person who engages in illegal or unethical business practices, especially in organized crime.

Origin:

Early 20th century: from racket + -eer.

Examples:

1. The racketeer was finally caught and sent to prison.
2. The racketeer had been involved in illegal gambling and prostitution.
3. The racketeer's empire was finally brought down by the FBI.
4. The racketeer's money laundering scheme was uncovered by the police.
5. Many famous gangsters and racketeers have been immortalized in popular culture.