No, you don't have to be a snitch for the police but you also can't harbor a fugitive or obstruct justice. Your best bet is to let your husband know that he should turn himself in and resolve these issues rather than getting arrested outright and that since he does not live there he is not welcome there and should not come to your home. You can tell the police not to come to your home any more unless they have probable cause or a warrant, but that may be best done for you by a lawyer. Since you are still married and he gave that address, it is not unreasonable for the police to expect to find him there which is why they are looking for him there. You should make sure the police know he does not live there and has no business there, so they stop coming by looking for him there.