The suspected shooter in the Arizona massacre may not have acted alone, says Pima County Sheriff Clarence Dupnik. This morning, the Sheriff’s department released an image of a man seen at the scene, described as a dark-haired Caucasian male approximately 40 to 50 years old. Meanwhile, details on the suspected shooter Jared Loughner are beginning to emerge. Classmates describe Loughner as often doing his own thing and occasionally disrupting class with nonsensical outbursts. One classmate said he applied himself in his high school band but caused trouble in his other classes, going on to say, "There are some guys who are just angry. I never really saw a smile on his face at all." Though a man who appears to be Loughner said in a December 15 YouTube video that he was a U.S. military recruit, the army says he wasn’t accepted. In other online videos he talks about “English grammar” and mind control. The Pima County sheriff said Loughner is mentally unstable.