For my story, after a gang member is arrested but then released for not being able to get her to speak up, she then has to lay low and not make contact with the rest of the gang, unless it's an emergency, because the police now know who she is, and could survey her. They send in an undercover cop to meet her, let him know he is one of the gang members, but a new one, since she has not spoken to the gang for a few weeks, or maybe even months, if that's better. So he came to her to warn her that the cops have evidence on her, and is lying of course, to try to get her to give up certain information. However, during the course of him meeting her and trying to get her to talk, she figures out that he may be an undercover cop, since he cannot answer certain questions about the gang's previous activities, that he would likely know, if he was a member. So she tries to flee him, but he chases her down to try to convince. She attacks him and a fight breaks out. Three other men then come and chase down the cop. These three men then tell her that they are gang members, but newer ones since she last saw the gang. They came to save her from the undercover cop, since the cops are all over her, they say. They then try to find out what she told the cops, or what they know from her. However, these three men are also undercover cops, and it was a contingency plan, in case she was not fooled by the first cop and they had to do something to prove they were the gang, like committing violence against an imposter. However, is this set up way too elaborate, even for police standards? The crook is guilty of participating in an infamous kidnapping and that is her only crime. But in order to bust kidnappers, would they go to such elaborate lengths? Obviously I want them to, to an extent for entertainment, but is this too much for the audience to buy as plausible for police methods?