I know that if when the police rings your door bell, they need your consent to come in. However, what if you let them in, then they said that they want to ask you some questions about a crime? Do I have the right to tell them to leave instantly even after I said they can come in? Can I be aggressive and say something like "get the f*** out of my house"? "I wont answer any of your mother F***ing questions". Do the police have to leave my house by law? Profanity in my own house allowed?