A shocking story out of a Chicago suburb: Prosecutors say a 14-year-old girl set her alarm for 7:50am Tuesday, woke up, and went downstairs to the kitchen as any normal teenager might do. Except that in this case, police say the girl grabbed a 4-inch long knife, went back upstairs, and stabbed her sleeping 11-year-old half-sister to death—more than 30 times in the neck, chest, and hands, NBC News and the Chicago Sun Times report. Her apparent motive is perhaps even more shocking: With every stab, prosecutors say she told the victim the younger girl was ungrateful for the older girl's housework; the victim had also punched her sister the night before, authorities say.
They allege the 14-year-old then showered to wash off the blood before calling 911, telling police a Hispanic male intruder had entered the home the girls shared with their mother—who wasn't home at the time—and did the deed, CNN reports. That led to the lockdown of three nearby schools before the girl's story unraveled. When detectives pointed to strands of hair tying her to the crime, police say she admitted to it, adding that she had contemplated the killing the night before. The girl now faces first-degree murder charges in juvenile court; a decision on whether to move the case to adult court will be made in a few weeks. (Read more stabbing death stories.)