1.   And new Internet entrepreneurs might not be aware of transgressions until the decency police knocked at their door.

2.   Jimo Thomas says the Mill Valley police knocked on the door of his apartment and told him and his friends to turn down the TV.

3.   Soon, Collinsville police were knocking at his door, asking to search the room.

4.   Police knocked a man unconscious in the melee that followed, and he was taken away in an ambulance.

5.   The tenant had apparently spent the night hiding after witnessing the shooting and did not respond when police knocked earlier.

6.   Two weeks ago, special Serbian police knocked at his Belgrade home.

7.   When police knocked at the door, its occupants opened fire, badly wounding an officer.

8.   When police knocked at the door, Ramirez invited them to have a drink, according to the deposition.