New details emerged Wednesday on the turning point in the AJ Freund investigation.
The Chicago Tribune reports a video of the badly beaten 5-year-old on his mother's cell phone helped crack the case.
A court document says phone records show AJ's mother allegedly searched "child CPR" on the night of her son's death, the newspaper reported.
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. AJ's body was found last week, and Cunningham and Freund charged with murder among other counts.
The Crystal Lake Northwest Herald reports McHenry County prosecutors have filed a petition to terminate Cunningham and Freund's parental rights to the younger boy. A court-appointed advocate is to meet with the younger boy and submit a report about his well-being.
Cunningham and Freund reported AJ missing April 18. His plastic-wrapped body was found Wednesday in a shallow grave.