An arrest occurs when police take a person into custody, restricting their freedom because they are suspected of committing a crime. In Canada, the Charter of Rights and Freedoms protects people from arbitrary arrest, meaning police generally need reasonable grounds to believe someone committed an offence. Upon arrest, police must inform the person of the reason for arrest and their right to speak with a lawyer. Arrested individuals may be released with conditions, held for a bail hearing, or in some cases detained until trial. The arrest power is a significant state authority balanced by legal protections for individual rights.