stryder.. I would look into ways of removing or not exposing private information about yourself and family from the Internet, if at all possible, but this may be hard and take a lot of time and not be generally worth it. You came across a real or potential criminal, or someone with a criminal mind who wants to extort money from you. Because they are from another country, I do not think that much can be done about it. If this bothers you, file a police report just to document this incident. This in turn may help the legal/judicial system accumulate materials and set up some ways to deal with it later, as a whole (kind of like what happened with Nigerian scams), but probably will not do anything for your particular case. It takes time and money to track down people in other countries, and it is unlikely that sheriff will help.
The guy or the group is using tactics to scare you into sending them money. And they are using urgency to get you to do it quickly. I do not know your age. But I bet this group sets people up and does get money especially from guys who are older, established, have some status, and in fear of prosecution just send the money to another country when threatened this way. If you are younger like 20s or so, I wonder why they would even bother with you, as typically guys that age don't make much money and don't have much to lose other than just being scared, like you are now. Get your mind out of the game. It is just a game. You are being played. You do not have to play. Walk away. For your mental health, give it a few days, and it will pass. Don't "jump". There is nothing to jump for. Try not to read emails from them, there is nothing good in them. If it helps, think of it as they are saying "boo!! I scare you" in a childish way. Laugh at that and move on with your life.
If they come to your door, you may have a problem. But, until then, all they are doing now is sending you emails with some information they dug up on you. Do not bite. And they won't come to your door. They are in another country, I highly doubt they will spend money to come to your door especially that they are asking you for money. Like I said, scam, scare tactics, fake urgency, to get you to open up your wallet. Nothing new in the world of scams and fakery. They are not physically in your face and you are in no danger. Let it die out on it's own, take 2 pills of "focus on something else", and move on with your life.