Under the power of a citizen's arrest, what must the arresting security guard do?

The correct answer highlights an important aspect of a citizen's arrest concerning personal safety. When a security guard performs a citizen's arrest, ensuring the safety of both themselves and others is critical. Searching the individual right after the arrest can be seen as a way to mitigate potential risks, such as hidden weapons or items that could pose a threat. This proactive measure can help to secure the immediate environment and maintain order.

While other actions such as restraining the person or giving explanations regarding the arrest may be relevant, they do not address the immediate assessment of safety that a search entails. Additionally, assisting injured individuals is crucial but is a separate obligation that arises depending on the circumstances of the situation and not specifically linked to the technicalities of effectuating a citizen's arrest.