Isabella Yun-Mi Guzman, 18, is accused of killing her mother by stabbing her 79 times in the face and neck. According to an affidavit, she even emailed her mother, writing, "You will pay."
On Thursday afternoon, the Colorado teen appeared in court wearing shackles on her arms and legs to formally hear the murder charge against her. But at times, Guzman appeared to look directly into the camera as she made various faces and gestures. HLN's Dr. Drew and the Behavior Bureau take a closer look at her courtroom conduct.