Final answer:
Under the power of a citizen to arrest, a security guard must immediately give the power of arrest and inform the person of the reason for it, to establish the legal basis for the arrest and ensure understanding of their rights.
Step-by-step explanation:
Under the power of a citizen to arrest, a security guard must give the power of arrest forthwith. This means that as soon as the security guard detains a person, they must inform them of the arrest and the reason for it. This process helps to establish the legal grounds for the arrest and ensures the person being arrested understands the situation.
During the arrest, it is crucial to maintain the rights of the individual, including protection against unreasonable searches and seizures. The detained person must be informed of their rights, such as the right to remain silent and the right to legal counsel. Only law enforcement officers can conduct a search to establish personal safety, and even then, it must be based on reasonable suspicion or probable cause, supported by an oath or affirmation.
It's important to note that the role of a security guard in making a citizen's arrest is limited compared to that of a police officer, and they must adhere to the legal standards and rights of the accused set forth in the rule-of-law countries to prevent violation of constitutional protections.