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JoAnn Cunningham, left, and Andrew Freund Sr. have each been charged in the murder of their 5-year-old son, Andrew "AJ" Freund. A criminal complaint filed Thursday, April 25, 2019, outlines first-degree murder, aggravated battery and several other charges against the couple. A judge set bail at $5 million for each parent. (McHenry County Sheriff's Department via AP)

JoAnn Cunningham and Andrew Freund Sr. of Crystal Lake appeared in McHenry County court Friday, the day after a 30-page grand jury indictment was handed down in the case.

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This undated photo provided by the Crystal Lake, Illinois Police Department shows Andrew “AJ” Freund. (Crystal Lake Police Department via AP)

JoAnn Cunningham and Andrew Freund Sr.’s younger son was taken into Illinois Department of Children and Family Services custody following the disappearance of Andrew “AJ” Freund. 

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This undated photo provided by the Crystal Lake, Illinois Police Department shows Andrew “AJ” Freund. (Crystal Lake Police Department via AP)

The Illinois Department of Children and Family Services had multiple contacts with Freund's family over reports of neglect and abuse in the months and years before the 5-year-old was found dead.

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Mourners gather outside the home of 5-year-old Andrew "AJ" Freund for a vigil Wednesday, April 24, 2019, in Crystal Lake, Ill. Andrew's body was found in a wooded area in Woodstock Wednesday, and the boy's parents have been charged with his murder. (John J. Kim/Chicago Tribune via AP)

Police believe the Illinois couple killed 5-year-old Andrew “AJ” Freund by beating him and forcing him to stand in a cold shower for an extended period of time.

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This undated photo provided by the Crystal Lake, Illinois Police Department shows Andrew “AJ” Freund. (Crystal Lake Police Department via AP)

Crystal Lake police Chief James Black said at a news conference Wednesday that police dug up what they believe is Andrew “AJ” Freund’s body in a field and that it was wrapped in plastic.

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JoAnn Cunningham, mother of missing 5-year-old child Andrew “AJ” Freund, stands with her attorney George Kililis outside of the Freund home as he speaks on her behalf and pleads with the public to help find AJ on Friday, April 19, 2019 in Crystal Lake. (Stacey Wescott / Chicago Tribune via AP)

The mother of a 5-year-old suburban Chicago boy who went missing last week is refusing to cooperate with detectives, police said Monday.