Don't "investigate" what other people in your household know about this. Usually answering "I don't know for sure" is better than the alternative.
The market for intellectual property has never been stable. Since the invention of the printing press, and the advent of recorded sound, every new technological development has threatened old models of compensation, and that is exactly what is happening today. The studios -- and in particular her in Massachusetts Three Strikes Holdings -- see their copyrighted content being shared online and some have decided to try creative ways to monetize that activity. That is where we get copyright trolling litigation. The people caught up in these lawsuits are today's Guinnea pigs. If you are one of the unfortunate few, it can be extremely unnerving, but don't let yourself be bullied.
This is not a criminal charge, it is a lawsuit for money damages.
If you are being sued, this will be an inconvenience, and potentially an expense, but there is no reason to let it be more than that. Do not give them the satisfaction of letting this keep you up at night. Think of it less like being investigated by the FBI, and more like having your transmission blow out on a road trip through the desert -- a hassle, but not a life-changing event.
Read through the topics below to learn how these suits are operate. Please note, this information is provided for purposes of background, and not as legal advice. To discuss the facts of your case, call or email me.
Please keep in mind that these cases are rapidly developing, and information that you may read, either here or elsewhere, can become outdated very quickly. Also, remember to read everything critically. There is a lot of information out there, and not all of it is reliable. Some sources tend to emphasize the good news, and suppress the bad. Others have an agenda of their own that may or may not align with yours.