Contract Compliance Division of the Human Rights Dept. If party-crashers arrive at your party, call the police and let them deal with the situation, rather than putting yourself at risk of a serious conflict. Don't allow anyone under the influence to drive away as you could be liable if they are injured. Inform your neighbors when you are having a party and encourage them to let you know if it is getting too loud, rather than them directly calling the police. Students are eager to be good citizens and avoid involvement with the police.
Police primarily investigate situations due to noise violations.
Remember that police do not necessarily know if the house they are entering is a student's house. Once police have entered a house, they will be concerned about underage drinking. The best way to deal with the police is to be cooperative and honest. They, like anyone, are more likely to react favorably to people who treat them with respect. The police will usually issue a citation before they arrest.