A Cahokia man will serve more than five years in prison for enticing an underage girl to commit prostitution.

Richard Anderson, 23, was sentenced to five years and five months in prison Tuesday by United States District Judge E. Richard Webber. Anderson pleaded guilty in September to one felony count of enticement to engage in prostitution.

According to court documents, in June 2012, the St. Louis County Police Department's Special Investigations Unit conducted an undercover prostitution sting operation.

The undercover officer responded to an Internet advertisement found in the "escort section" of the St. Louis "backpages" on backpage.com. The advertisement used an out-of-state area code and depicted several sexually-suggestive photographs of a young female who purported to be 19 years old.

The undercover officer called the telephone number and made contact with a female who was later taken into custody after officers suspected she was a minor. She was confirmed to be a 17-year-old girl.

Anderson acknowledged that he generated most of the Internet postings via backpage.com, and marketed her services for commercial sex. Anderson kept all of the minor's earnings for the sexual services rendered, according to prosecutors.

This case was investigated by the FBI and the St. Louis County Police Department.