Why do you think you are the best candidate for the police officer position?
Working with law enforcement is not everybody's dream job. There are many unpleasant scenarios a police officer has to go through. To make sure that you are the right candidate, you need to show your interviewer that you have what it takes to be a good police officer.
Start with some real-life experiences and how you think it reflects on you as a person fit for the job. You need to show them your respect for law enforcement and the police force. Try showing your previous experience if any, your ability to work with different kinds of people and most important of all, your willingness to learn and grow while on this job.