I discovered a plot hole in my story that was overlooked before. After doing research, apparently in Canada (my story's setting), you are not allowed to record a conversation unless you are part of it. That makes sense. In my story, a cop is raped by a serial rapist/killer type of villain, he is pursuing, only to find himself being on of the victims later. After the villain gets away with it, the cop obsessively pursues him wanting justice for what was done to him. Now I wanted to write it so that the cop was following the villain around on his own time, but since he cannot record anything the villain says to incriminate himself to any of his associates, what can he do instead? I don't want the villain to have any more potential victims at this point. I would just like him to incriminate himself and be caught. But since the MC is not allowed to record anything what kind of evidence could he get? He cannot break into the villain's property to obtain anything either, since that's also illegal, so is their anything that my MC can do on his own, without warrants, since the villain is legally off the hook, and the prosecutor will not the help the MC? Perhaps there is something in the law that might work for my story idea?