Just so you will know: the police do not "forget about it". However when no one will provide information to the cops they run out of people to talk to. Maybe you think the police are supposed to magically know who commits every crime. Leads are developed from sources of information who are verified and corroborated before they make an arrest so that you don't have the opportunity to write a comment about the cops nabbing the wrong guy. Also if you charge and try the right thug and don't have your case together when you go to court, the thug goes free and can't be tried again.
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