It's possible the case is still active. The statute of limitations only prevents the State from filing a case after a certain amount of time. However, if the case has already been filed then the SOL doesn't apply. Hire a local lawyer to research the case and see if it has been dismissed.
If you're son went to trial on a federal drug conspiracy then he should have had a lawyer assisting him. Questions about how the sentencing guidelines apply to evidence at trial are best answered by someone who was at the trial or has reviewed the transcript. I would recommend that you ask his trial lawyer these questions, or hire a lawyer who handle federal criminal appeals to assist. This question is beyond the scope of an Avvo answer. You'll need to consult with and/or retain a lawyer if you...
First, don't assume you are indigent. The court has to make that finding and the bar is set very low with regards to income and assets. Second, the court is not going to appoint you a lawyer, because you already have one.
Try to salvage this relationship with your attorney. If this lawyer won't return phone calls then try to schedule a consultation. Send certified letters asking about your case. Those get a lawyers attention. The plea offers in a case are a product of discussions between...
If he has a court appointed lawyer I would ask that lawyer what to expect. It is typical in many Texas counties for a criminal cases to have more than one announcement setting. But I don't take cases in Temple, so I don't know the process there. You would need a local lawyer to advise you on how many times a case is reset.
If she had a trial and she is indigent then she should have a court appointed appellate lawyer. I'd ask that attorney about how the process will work in her case. If you are not satisfied with that attorney, then you should find some local post conviction lawyers and schedule some consultations. Here is my page on how the criminal appeal process works.
Is it legal to sue you? It's not a crime to sue someone. So yes, it's legal. Will he win any money from you? That's not a question Avvo can answer. Here is what you need to, take whatever papers you have and meet with a local family lawyer. Ask them what you need to do to defend yourself in this lawsuit.
I am sorry to hear about your situation. You should meet with a local attorney who handles construction lawsuits. Most lawyers offer free consultations and you need a consultation to determine if you have a case, or if it's worth investing in a lawsuit.