He still has a chance to get the police to believe him. He can literally have them lock him up and surveil him while Nigo does this plan, giving the info to the cops. If the cops go along with it and his clone follows through, it would be enough proof that there is a double with him being in two places at once. Sure, won't help him with the criminals who want him dead, but it at least gets legal entities to be properly aware and likely on his side.