ITA MJ, if I call CPS and tell them that I think the kid down the street is being abused in ANY way, CPS will appear on that doorstep and investigate.
I don't have to have any proof either, the phone call is sufficient and it can be anonymous.
I don't see how the phone call is a phoney, obviously they found evidence of child molestation/rape, so, even if the caller wasn't involved in it, the call was still true.