A federal judge on Monday postponed the sentencing of former D.C. Council Chairman Kwame Brown on the felony bank fraud charge that drove him from the city's second-ranking post.

Writing that Brown needed "to complete his cooperation," U.S. District Court Judge Richard Leon moved Brown's sentencing from Sept. 20 to Nov. 13.

Brown resigned hours after prosecutors charged him with bank fraud on June 6, and he pleaded guilty two days later. In court, Brown acknowledged that he lied about his income to secure two loans, one of which he used to purchase a boat named "Bullet Proof."

Under the terms of his plea agreement, Brown faces up to six months in prison. Leon could opt for a harsher sentence of up to 30 years in prison, but such a ruling is unlikely because of federal sentencing guidelines.

Prosecutors also charged Brown with a local campaign finance violation: "aiding and abetting" cash expenditures of more than $50 from an account linked to his campaign.

That charge, a misdemeanor, carries up to six months behind bars.