Basically for my story, which is a thriller set in modern times, a gang of villains are recruiting a new member, and they give him a 'blood in', which is a term used for when a gang tests a new recruit, by having him/her spill the blood of another person, or at least see if they will do it. The gang in my story, wants to make sure that the new recruit is not be an undercover cop. So they put him through the blood in, but they do not want to put the man in a situation where he has to harm a real hostage. The reason is, is because if he is an undercover cop, and there could be other cops nearby, they would be up on kidnapping related charges, if they had a real hostage for the new recruit to harm. So the gang decides to use one of it's own members, posing as a hostage, for the new recruit to pull the trigger on. But the gun will not be loaded. It will be loaded with a dummy round, that won't fire, in case the new recruit is an undercover cop. That way, if he is, and he tries to bust the gang, the hostage, will not testify against them, if she is rescued. During the blood in test though, a real cop is patrolling the streets, and he gets a glimpse of two of the gang members search the new recruit for weapons and a wire. He sees that the new recruits are hiding their faces with sunglasses and hats, as well, to hide their faces from the new recruit. After seeing that the new recruit is clean, the gang takes him to the place where they are holding one of their own members, who is posing as a hostage for the new recruit. The cop follows them, sneaks around to see what is going on, and spots the blood in, in progress. He stops it and manages to arrest one of the gang members, and rescue the fake hostage, thinking she is real. The other gang members as well as the new recruit, escape as the cop rescues her and arrests the one. I wrote it out before that she doesn't know what the cops know, and therefore she does not want to get caught in any lies. So she chooses to remain silent, and not say anything. This causes the police to want her to cooperate so the prosecution subpoenas her to appear at a preliminary hearing, to testify against the arrested defendant. This causes the gang to worry that she will be caught in a lie, even though she is willing to, when being forced to testify, and they plan on killing her. However, after going over the plot with fresh eyes, and asking some others' opinions, the defendant being arrested causes complications in the plot that I don't want. So I was thinking of changing it to that maybe the entire gang gets away, and all the cops have is her, but she will not cooperate, in telling anything about the others. So I was thinking of writing it, so that the prosecution subpoenas her to appear before a grand jury instead of a preliminary hearing, and she will testify at the grand jury with no defendant to prosecute. She just testifies as to what happens. However, is this enough of a reason for the gang to come after her and kill her? Especially if no defendant has been arrested? They don't have to try to kill her necessarily, but I would like them to physically come after her, even if it's just for threats or another reason. In order for the story to go where I want it to go, I would like a physical attack on her of some sort, for it to work. Or would the gang have to actually have one of their members in custody in order to be pushed far enough to kill one of their own? Thank you anyone for your opinions. I really appreciate it.