Under what condition may a private person arrest someone for a felony?

A private person may arrest someone for a felony if they have witnessed the crime or have clear evidence that indicates the suspect committed the crime. This allows them to act on the belief that the felony has occurred. In legal terms, if a private citizen is present during the commission of a felony or has a reasonable belief based on reliable information that a felony has already taken place, they are allowed to detain the suspect until law enforcement arrives.

This understanding is rooted in the legal concept of a citizen's arrest, which grants private individuals a measure of authority to act in certain circumstances to prevent further harm or ensure justice when law enforcement is not immediately available. It is important that the private person has reasonable grounds for their belief, as acting without this basis could lead to legal repercussions.

The other conditions provided in the options do not fulfill the necessary criteria for a private arrest. Suspecting an act without concrete evidence or witnessing the crime does not grant the authority for an arrest. Similarly, only law enforcement officials have the training and credentials to execute certain arrests under specific protocols, and consulting with a peace officer does not grant authority to make an arrest unless the criteria of witnessing or evidence are satisfied.