Description:Six months ago, a student came to Triton High School Principal Catherine DePaul with a disturbing story: She believed another student was involved in a sexual relationship with a teacher at the school, and she'd seen explicit text messages the two had exchanged.
At that moment, prosecutors say, a cover-up was put in motion that ultimately unraveled Thursday when DePaul, an assistant principal and three teachers were charged with offenses ranging from child endangerment to sexual assault.(0:42)