A new research study shows the failure of Child Protective Services (CPS) investigations. The accompanying editorial is not freely available, but it is described in this NY Times article.
Congress tried to go national with the state CPS child abuse registries, but a federal HHS study said that it was not feasible. An AP story about it is here.
Two CPS cases are currently before the supreme court, Camreta and Alford v. Greene Los Angeles County v. Humphries. The court ought to declare the CPS practices to be unconstitutional, but probably will not.