There needs to be names and addresses to go with the faces.
This is state sponsored terrorism committed by the FBI.
A paid for find anyone application can work wonders.
Courthouse records are a goldmine.
If someone owns real estate, the tax assessor has to have an address on record, which could be the person that you are looking for, or a protective layer in between.
If a person moves, I believe you can buy their forwarding address from the USPS for $1.00.
There are books on how to find people.
Keep the faith freeper.
PS
I learned how to find people from an expert. (I am not an expert per se, but I am a good sleuth.)
More than that. Punishment, real punishment which is assigned to traitors. Trial for treason and hanged.