search nc or name check in this forum, you will find

a lot of posts. No silver bullet. Most of people is working in this way:

1) contact to senators, congressman, directors of FBI, immigration office, first lady, President, etc. All people who may be helpful. like me, i wrote to those people once two months.

2) WOM, when you got enough evidence, go to WOM. bioinfo posted many very good posts about WOM in this forum. search his name.