Ann Migliorato, 61, of Crystal Lake.

Court documents allege a woman arrested Friday for running an unlicensed daycare facility in Crystal Lake strangled an 11-month-old baby and also fractured his rib.

The Crystal Lake Police Department received information around 11 a.m. Monday from the Department of Children and Family Services (DCFS).

The agency reported an aggravated battery to a child that occurred in the 1400 block of Woodscreek Circle in Crystal Lake.

Crystal Lake Deputy Police Chief Richard Neumann said an investigation was immediately initiated into the offense.

Investigators learned that the offender, identified as Ann Migliorato, 61, was operating an unlicensed childcare facility.

Additional evidence revealed that the offender physically injured a child who was in her care at the facility, Neumann said.

The child sustained non-life-threatening injuries that required medical care.

A criminal complaint filed in McHenry County Circuit Court alleges Migliorato battered the child, an 11-month-old boy, around 4 p.m. on April 11.

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Migliorato applied pressure to the infant’s chest, causing a rib “or ribs” to be fractured, the complaint said.

The complaint said Migliorato strangled the infant by applying pressure to his neck, causing a lack of oxygen.

Neumann said Migliorato, who resides at the residence where the facility was being run, was taken into custody without incident on Friday.

Migliorato was charged with aggravated battery to a child causing great bodily harm, a Class X felony, and operating a child care facility without a license, a Class A misdemeanor.

She appeared before a judge Saturday morning and was ordered detained pending trial after prosecutors filed a petition to detain, court records show.

Neumann said the investigation remains active and is still ongoing.

Anyone who may have information relating to the location, offender or incident is asked to contact the Crystal Lake Police Department at 815-356-3620.

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Anonymous tips can also be sent to the Crystal Lake Police Department by texting the word CLPDTIP along with the tip information to 847411.