Bryant Purvis, the last of the so-called "Jena 6" to be arraigned, pleaded not guilty Wednesday to reduced charges of battery and conspiracy.
Purvis had initially been charged with attempted second-degree murder, but in a brief court hearing, that charge was reduced to charges of second degree-aggravated battery and conspiracy.
If convicted, he could be imprisoned for up to 22 years.
The six black teens known as the Jena Six were arrested after a December 2006 attack on Justin Barker, who was knocked unconscious, at Jena High School in Jena, La.
Four of the other accused teens also had the charges against them reduced after initially being charged with attempted second-degree murder. Charges against the sixth teen, who was booked as a juvenile, have been sealed.
Mychal Bell is the only one of the six to stand trial. He was convicted in June of aggravated second-degree battery and conspiracy. The convictions were later overturned and the case sent to juvenile court.
Bell, now 17, was sent to jail last month for a probation violation in an unrelated juvenile court case.
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