In my story, a woman is under protective custody, because she is a witness, testifying against her kidnappers, who the court is anxious to put away because of their past murders. So they are willing to give her protective custody. One night, they assign four officers to protect her. She knows the main character officer more than the others, cause the others are more new this night. One of them she has not met before but she recognizes his voice as one of the kidnappers voices, when she was abducted. She tells the main character officer, in private, that she recognizes his voice and he is one if the captors. The MC is alarmed by this and thinks he may have gotten on on this job of protecting her, with the intention of harming her, since he switched shifts with another officer, and just recently got assigned to this job. Now what would the MC do? Would he decide to arrest the suspect cop, without telling the other cops, and then explain the situation to the other cops, after the suspect cop is already in cuffs? Or would he tell the other cops, before so they can all arrest the one cop together? Or would the MC not fully trust the other two cops either, just in case they may be in on it as well. What do you think?