For some reason, the HHS press release has disappeared. I normally can hunt them down when this happens, but I find the document.
Discrimination charges were filed against the Wisconsin Department of Children and Family Services. Families were denied assistance, leading to minority child removals to foster care. More details are found in the agreement.
Voluntary Compliance Agreement between HHS and Wisconson
Naturally, none of this information will be included in any research or studies as to the overrepresentation of minorities in foster care.