There's a big difference between telling a child that police are coming for her, whenever she hears a siren, and telling a child that a law is set by someone else and it's not your discretion whether she follows it. There are plenty of other laws that DD follows, like standing up for less-able people on the train, or waiting to cross the road, and she's not afraid police are going to arrest her if she forgets one of those. She knows what police are there for, and she knows they don't arrest kids. Honestly, I know you mean well, but you've jumped the gun.
