This was covered by our local Fox affiliate. They had a local attorney on who said the father did just right - no warrant, no entry or search. He also said that most folks would be intimidated by the PD, but shouldn't be. Does my heart good to see a news report like that one.
As for what the PD & CPS did, well, it wasn't right. And something unpleasant should be done to the one who called in the report.