There is no such thing as not to sue anyone. Police can squeeze and lie as much as they want, but there are laws about the abuse of power, false police reporting, obstruction of justice. But it will be expensive as effectively you are going to the court against a state.

Also of course there is a person somewhere behind a keyboard who wrote the software which flags, correctly or incorrectly, files. Their name (Thorn) is kept strictly away from any public testimonial with NDAs with police, because eventually there will be class action lawsuits against them in the USA.