The Chicago Tribune is reporting that Chief Keef was released from Cook County Jail yesterday, after serving ten days in the pen. Keef was sentenced to a 20-day bid on October 15 after failing a drug test in which he tested positive for marijuana.

Chief Keef, real name Keith Cozart, was released ten days early on his sentence for good behavior. Lisa Gordon, a spokeswoman for the Cook County State's Office told the Chicago Tribune that Keef was released early after receiving good time credit that cut his sentence in half. Inmates arrested on non-violent offenses are eligible to earn day-for-day credit while serving their sentence if they exhibit good behavior while in jail.

Keef's stint in jail stems from a May 27 incident where he was caught speeding in his BMW in excess of 110 mph on the Edens Expressway in Chicago. He was sentenced to 18 months probation and was ordered to undergo random drug testing by the judge.