Best not to say what you might do. I doubt there's anyone on this forum who is incapable of doing the unimaginable if a loved one is victimized by a thug, then victimized again by the Criminal Justice System. Your sense of powerlessness can overwhelm your morals and conscience. Even thinking could get you into trouble, like praying to yourself alone on a public sidewalk, in front of an abortion clinic.
These are my observations of our Criminal Justice System:
Police and prosecutors don't get to pick their victims. Police and prosecutors don't get to pick their witnesses. They have to deal with the evidence available to them and hope a jury comes to the right conclusion based on that evidence, not the character of a victim, a witness or the defendant. Some victims and witnesses are just as despicable as the defendant.
Judges generally don't allow anything to be introduced which could "prejudice the jury" against a defendant. But that's inferring that the Criminal Justice System doesn't trust that a jury can be fair and impartial with the excluded evidence. Excluding all available evidence from the jury is dishonest. But jurys are humans with biases and are unpredictable. Maybe AI is in our future Criminal Justice System.
It's been noted that 'scientific evidence' on tv crime programs has lead jurys to expect there is always fingerprints, trace evidence, DNA and amazing machines to solve cases. That's not realistic.
Prosecutors follow the rule "a prosecutor should not charge a defendant unless it is likely that the admissible evidence is sufficient to obtain a conviction and that the conviction will be upheld on appeal." They don't have unlimited budgets to prosecute every case. A grand jury might be used to test the strength of a case. Plea agreements are to often made to defendants when a jury should have considered the evidence. In some cases, a plea bargan is better than no prosecution. Victims frequently have no imput.