A federal judge has sentenced a 36-year-old Lawrence man to serve nearly 20 years in prison for his role in a cocaine and crack cocaine distributing ring that operated from 2000 to 2006.

Shaune Frazier, 36, had pleaded guilty in 2007 to one count of conspiracy to distribute cocaine and crack cocaine from 2000 to 2006. Frazier admitted that he and co-defendant Gerald Dunn headed the trafficking organization in Lawrence.

According to Interim U.S. Attorney Lanny Welch’s office, the two men distributed crack from apartments in Lawrence, including in the 400 block of Wisconsin Street, the 2400 block of Alabama Street and the 500 block of California Street.

Prosecutors said by 2003 the two men were responsible for distributing one kilogram of crack cocaine a month. They relied on co-defendants to distribute the drugs.

Dunn is set for sentencing in January in U.S. District Court in Missouri. Nine other co-defendants have also been convicted in the case.

U.S. District Judge John Lungstrum ordered Frazier to serve a 235-month sentence on Monday and to be taken into custody by the U.S. Bureau of Prisons.