You have certain constitutional rights that police and law enforcement must honor. However, police are not legally required to “read your rights” at the time of an arrest. The rule is that Miranda warnings are required if you are being questioned in police custody. “Custody” in such cases is not limited to physical lock-ups at police headquarters but also applies to situations in which a reasonable person would conclude that they were not free to leave. If police neglect to read you your Miranda rights, any evidence obtained in contravention of your rights cannot be used against you in court.