If you didn't do it, simply tell the cops that since you don't know anything about the crime and didn't do it, there is no reason for the cops to question them and tell them to leave your property until that have either a search warrant or a warrant for your arrest. Had DW simply declined to talk to the cops, he would have never been charged.Is that how the other neighbors handled the police knocking at their doors?
I don't think so. Referring just to your advice to tell the cops to go away right away. Once they obviously were viewing him with suspicion by taking him to the PD, and maybe even before, he would have been well advised to ask for a lawyer then and there.
He did and they ignored his requests.