from hurting herself. but is also illegal in texas. >> there was a guilty feeling i had that was associated with it, but there was also fear of consequences. >> when kara turned 17, the zartlers decide they don't want to keep their secret any more. they believe the only way to create change is to share her story. did anybody say, don't do this? >> yes. >> who? >> everyone. >> family members? >> yeah. they all did. friends. >> because they were worried about the reaction? >> consequences, right. it was all about, you are going to end up in jail over this. >> that's when they decide to have christy film kara having a violent fit. and mark giving her cannabis. mark posted the video on facebook, and it goes viral. the story makes local and