Children's Services and the criminal justice system is a huge machine best understood on the basis of Machiavellian power. It exercises power as naturally as breathing. It works relentlessly to preserve and maintain power. It skirts or ignores inconvenient laws. It covers its own when they do wrong .
Ethnic communities see it.
They see a lot of it. That's why they hate the police. If you can, ask the officer to leave. If they refuse, consider calling 911. Caseworkers will demand to talk to your children without you present.