Six teen girls lured a former friend to a home and ambushed her, taking turns pounding on her face and body for 30 minutes until she was unconscious as someone videotaped the violence, according to the Polk County Sheriff's Office. "Shocking, I've never seen anything like it," Polk County Sheriff Grady Judd said. "They seem to have absolutely no remorse at all. I don't understand the sheer violence." Investigators said the victim apparently posted something against the six girls on MySpace before she was lured to the home by a phone call from teen Mercedes Nichols. Police said the girl...