The Supreme Court of the United States of America ruled out that the policemen having warrants may enter houses, flats and other premises without knocking or introducing themselves.

Such was the decision of the Supreme Court of the United States in a 1998 case of Booker Hudson, in whose house firearms and drugs were found. The lawyers of Booker Hudson lodged a complain to the Supreme Court claiming police misconduct for the latter failed to inform the tenants about their arrival by knocking at the door and introducing themselves. Thus, the evidence were procured illegally and seemed to be null and void.

The judges made their decision grounding on the fact that it was of no importance whether the policemen introduced themselves and knocked at the door or not. They held a warrant to proceed with the search and as a result they would have found the drugs and the firearms anyway. The ruling was adopted by a narrow margin of 5 votes to 4.

Thus, the police of the United States of America was granted the right to enter the premises without knocking or introducing themselves provided they had a warrant.