no-knocks are when the Police serve a warrant to search a house or apartment and they don't have to knock on the door or show you the warrant before entering. They can either knock down the door or if the landlord is involved, walk in with a key. The police use them often in cases of drugs or weapons, because they want to catch the person before they can flush or hide the evidence. The no-knocks are often served in the middle of the night to use the element of surprise and catch people sleeping. The police know this is a dangerous situation, so they will serve these warrants in full tactical gear and the guns ready. The situation is dangerous for both the police and for the people being served the warrants. That they are applied more against BIPOC makes them racist, even if the intention is not racist.