Here in Alaska convictions are public record, and accessible via a (very popular and heavily used) website. Information about open cases, pending court cases, arrests and such, is entirely different and is significantly regulated and limited by the investigated agency or prosecuting agency. Realistically, officers who are looking for anyone from a suspected cannibal-serial killer to a potential witness to a minor hit and run collision are going to "just need to talk to them," when looking around for them. Besides possible effects on the investigation, there's the whole issue of what happens when a guy isn't guilty at trial or charges just fizzle entirely and officers have been, say, canvassing his neighborhood telling the neighbors "they're looking for him since he beat his wife/molested his kids/set fire to a nun/whatever."