In the "kids for cash" scandal, judge Mark Ciavarella, who promoted a platform of zero tolerance, received kickbacks for constructing a private prison that housed juvenile offenders, and then proceeded to fill the prison by sentencing children to extended stays in juvenile detention for offenses as minimal as mocking a principal on Myspace, scuffles in hallways, trespassing in a vacant building, and shoplifting DVDs from Wal-Mart. Critics of zero-tolerance policies argue that harsh punishments for minor offenses are normalized. The documentary "Kids for Cash" interviews experts on adolescent behavior, who argue that the zero tolerance model has become a dominant approach to policing juvenile offenses after the Columbine shooting.