He's the kid who shot three kids at a high school, then during sentencing wore a shirt with the word "Killer" emblazoned on it and flipped off the families while saying "This hand that pulled the trigger that killed your sons now masturbates to the memory. Fuck all of you!"
His interrogation was finally released in four videos. I've posted a link to the first one, and it's quite fascinating to observe him moments after the shooting and compare that with his behavior at trial:
