A stint in rehab hasn't exactly deterred Chief Keef from old habits. Two weeks after Keef, née Keith Cozart, was released from treatment in Southern California, he was arrested for DUI near Chicago.

Police stopped the 18-year-old rapper on March 5 for driving with expired tags in a 2010 Jeep Cherokee. He smelled like marijuana and admitted that he had been smoking, sources say. 

He ended up failing a sobriety test and was charged with DUI, driving with a suspended license, and no proof of insurance. He posted $300 bail and was released from custody. 

The post-rehab bust may not come as much of a surprise to anyone familiar with the teenager's antics. Besides instagramming photos smoking weed, he released the song "F--- Rehab" not long after he ended the court-ordered 90-day sentence.

In an interview last month, Keef seemed even less enthusiastic about his rehab stay. "It's like being locked up," he told Billboard. "And when I'm locked up, I don't want anybody to come see me. I won't let my family come here."

There was one good thing to come out of treatment, however. Keef is no longer getting high on "lean" aka codeine cough syrup. The sugary soda and medicine concoction killed UGK rapper Pimp C, and was rumored to have contributed to Lil Wayne suffering multiple seizures last year.

Now that he's "lean" free and out of custody, the "I Don't Like" rapper is attempting a career rebuild. He's working on his sophomore album, Bang 3 (Kanye West is reportedly a producer), and dreams of launching a line of surfing products one day.    

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(Photo: Chief Keef via Instagram)