KTRK-TV investigates public charter schools in Texas. Some of the schools have spent taxpayers' money inappropriately, and have bought diamond jewelry, women's lingerie and men's clothing with public finds, the investigation reveals. Another major finding is that charter schools fail to check the criminal background of the employees they hire. The investigation exposes a convicted killer and a sex offender with school jobs. The reporters interview former principals and teachers who admit on camera to falsifying school attendance records.