Chief Keef, the popular, polarizing and troubled teenaged Chicago rap star, is going to jail. TMZ reports that Keef, aka Keith Cozart, tested positive for marijuana on a random drug test issued as part of his parole for a speeding ticket incurred last May in Chicago, when he was clocked at 115 mph in a 55 mph zone. Keef posted the above photo on his Instagram account today before turning himself in to Cook County authorities today to serve a 20-day sentence, along with the following message:

Outside The Court House Turnin My Self In [emojis] But Fuck It I Got Niggas Facin More Then That ! For Shit Like killin Police officers

Keef’s Finally Rich was our final Album Of The Week of 2012.