An 11-year- girl was stabbed 40 times by her 14-year-old sister, police say, and the reason why has left many in the small Chicago-area community of Mundelein reeling in disbelief.
Police found the 11-year-old girl unconscious and in need of medical attention in an upstairs bedroom of the dwelling on . She later died.
Because the sister, who called police, initially told an intruder was to blame for the attack, authorities briefly placed three on lockdown.
The truth, when it emerged, was even more shocking.
The 14-year-old, authorities say, repeatedly and fatally stabbed the victim -- her half sister -- with a kitchen knife because the teen thought ungrateful.
"This incident is a tragedy that defies understanding," said Mundelein Mayor Steve Lentz. "I am asking the Chicagoland area, please pray for us. Pray, first of all, for the family that has been devastated by this."
A group called "Mundelein Moms" is raising money for the girl's funeral and said it raised $6,381 in just one day. There also is an effort to have leave their lights on Friday night in remembrance.