What movie has Bruce Willis I think as an officer that goes to a huge mansion in the mountains that was robbed?

Its this movie I saw a long time ago. Some girl is with her family and they're at a gas station or something and a nearby truck has 3 older guys in it who apparently know this girl. The 3 guys follow the girl and her family back to their HUGE house out in the mountains. The next part I remember is the guys break in and so the little boy goes to activate a silent alarm or something. The police show up and a black female officer appears at the gate and one of the guys jumps out and shoots her. I believe the little boy has a cubby hidden in his room where he hides and talkes to Bruce or someone over the radio. Anyone know this movie?