The system is not symmetric and it's not supposed to be. For example, the prosecution is required to disclose all of their evidence to the defense, but the defe

The system is not symmetric and it's not supposed to be. For example, the prosecution is required to disclose all of their evidence to the defense, but the defense has almost no requirements to disclose evidence to the prosecution. A defense attorney who has proof that their client is 100% guilty must still defend their client to the best of their ability. A prosecutor who believes that the accused is innocent is ethically required to dismiss the case. (Obviously, this doesn't always happen, but it's supposed to.)