Now, to the facebook post that led to the arrest of two, young girls in connection with what police say was the cyber bullying suicide, of a 12-year-old girl, who jumped off a tower after allegedly... See More
Now, to the facebook post that led to the arrest of two, young girls in connection with what police say was the cyber bullying suicide, of a 12-year-old girl, who jumped off a tower after allegedly being tormented online. The oldest of the two arrested, a 14-year-old, waking up in jail this morning. We're going to hear from the passionate sheriff who brought the charges. We're going to hear from him. But first, abc's matt gutman with the latest on the story. Reporter: Calling this a nightmare they want to end. The parents of the girl being accused as the bully ring leader, defend their daughter. Were you told she was a bully by the school? Never once. Reporter: Telling abc news exclusively overnight, their daughter charged with felony aggravated stalking, could not have done it. You would check her facebook? I would check her facebook every time she would get on it. Every night she would get on. Reporter: You checked her facebook every night. Reporter: But the father of the other alleged bully, tells abc news he wishes he could do more. I feel horrible about the whole situation. It's my fault that maybe I don't know more about that kind of stuff. I wish I did. Reporter: On tuesday, polk county sheriff, grady judd, painted a violent picture of the two girls. There were things like you should drink bleach and die. Reporter: The sheriff was naming names. And taking the extraordinary step of brandishing pictures of the two minors. The reason we rushed these arrests quicker than we wanted to is because of this post. Yes, I bullied rebecca. And she killed herself. But I don't give a -- and you can add the last word yourself. Reporter: But the parents of one of the girls charged, flatly denied it. Saying their daughter's facebook had been hacked. That's something your daughter would wright? She's not that type of girl. That would say something like that. Reporter: This has been so intense, the parents asked their faces not to be shown. Abc news is not revealing either identity because both have been charged as juveniles. It brought a sliver of relief to rebecca's mother. I cried. It was a mixture of tears. It was relief. It was sadness because becca's not here. Reporter: This weekend, robin, would have been sedwick's 13th birthday. Now, the 14-year-old girls are waking up in the jail behind me. The parents of both girls concerned that after all of this exposure, their daughters' lives might also be destroyed.
This transcript has been automatically generated and may not be 100% accurate.