Six U.S. States have laws allowing Citizen Grand Juries to be formed by groups of citizens: Kansas, Nebraska, Nevada, New Mexico, North Dakota and Oklahoma.
No doubt there are many Frankenshot victims in those states. Murder charges should be brought by Citizen Grand Juries in those states. Even if the ultimate verdict is innocent, the discovery process will uncover essential truth. Also many such cases should be brought, one for each murder. The only way to stop the tyranny is to start at the local level. The Federal government is hopelessly or nearly hopelessly corrupt.
You are very lucky to have this option available to you. Long live the American Constitutional Republic!
Not the only way - but perhaps one of the gentlest ways.