A senior New York State judge once quipped that “a grand jury would ‘indict a ham sandwich,’ if that’s what you wanted.”
Read this account of the behind-the-scenes action in the police shooting of Tamir Rice, and you will understand how your patriotic activity will be presented to the citizens who supposedly offset prosecutorial power.
Know the District Attorney in your area.
Know the assistant DAs in your area.
Know every damned thing you can learn about them.
You are going to need that information.