WLS reported the 7-month-old girl was found with a woman identified as her grandmother. The child was dead with gashes to her throat, believed to have been made with a circular saw.  The woman was alive, but had self-inflicted wounds.

Chicago police told WLS they believe the woman was frustrated because the baby wouldn't stop crying.

The 57-year-old woman was taken to a hospital, in police custody. Records show the family had no previous problems with law enforcement.

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