It's the middle of the night and someone's banging on your front door. You see a flashing police light and hear a voice saying: "This is the police. Open up!" Do you ...

You hear a loud knock. Then a voice: "Police! Open up!" It's unexpected. Your heart races. Why are they here? Is someone in danger? Are you in trouble? And the big question: should you open the door?

It's the middle of the night and someone's banging on your front door. You see a flashing police light and hear a voice saying: "This is the police. Open up!" Do you ...

A man impersonating a police officer shot and killed a Minnesota representative and her husband, also injuring another lawmaker and his wife. Experts and police recommend not opening the door for ...