Can a police officer question me for no reason?

A police officer, just like any other ordinary citizen, has the right to approach you and ask questions and at least ask to search you or your possessions. However, you do not have to answer questions or comply with a search. A police officer, nevertheless, has no duty to inform you that you have the right to refuse to answer questions or comply with a search. Consent is key here - if you don’t consent, the police officer has no right to search or ask questions. However: If a police officer questions you without reasonable suspicion or probable cause, don’t get too excited: You don’t have any right to sue the officer for damages. Again, the police officer - just like anybody else - has the right to walk up to you and ask questions. But - just like with anybody else - you have the right to walk away.