There is an FBI office in Tyler. Phone #903-592-4301. You might call them if you haven't already.Other Law enforcement agencies should already been invited in. We have people missing here too. Unless the family ask Gregg County to ask Texas Rangers in they won't get involved. Two FBI headquarters in Texas. Dallas and Houston. I called Dallas FBI. I will pursue justice with Rosemary family.
Has the family gotten her phone records from the phone company? I would think the records would be released to a family member. Worth a try.
Check out this story if you're not familiar with it already.
Father follows cellphone coordinates to find body of missing son