Well it should be easy enough toprove you weren't arrested, because there won't be any book-in paperwork. I'm not sure if this matters (I can't tell much about your cases based on the facts you've provided), because it's not unusual for a case to be filed at large. You need to start interviewing defense attorneys right away.
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Set aside the details for a moment and this boils down to you are saying you are innocent of the present charge against you.
If you can afford a lawyer, get one now. Landon Northcutt is in your part of the state. I have seen his work enough at the courthouse in Brownwood to respect his skills. You might start by meeting with him about this.
Whether you can afford to hire an attorney or have to get a court appointed lawyer, you do need a lawyer. A lawyer can sit down with you, go over what happened, and just maybe convince the prosecutor that a mistake was made in charging you this time.
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