Criminal misconduct by an elected official is typically handled by the local DA. In instances where the local DA is also suspect, the jurisdiction falls to the Texas Rangers (the law enforcement agency, not the team). The Rangers can be reached at 512-424-2160. Good Luck.
Listen to Ms. Foley. You need to hire a good DWI lawyer. The terms of the deal vary based on the facts and your prior record. Assuming the state has charged you with a 3rd degree felony, 7 years is the upper end of the punishment range but Denton county takes a hard line against DWI. These and the issues in the other answers underscore the fact that you need to pay the money and hire a lawyer.
No. While Texas courts have declined to place a time limit on a stop, it has generally been felt that 40 minutes is too long to wait on a drug dog. You need to lawyer up and he can file a motion to suppress. Good Luck.
Occasionally the magistrate at the Dallas County Jail will require a cash bond. You will need to hire an attorney to file a motion to modify his bond condition on Monday morning to allow a surety (bail bondsman) bond. While it is not illegal, it is very rarely required once the case gets assigned to a court.
There are a lot of good lawyers in Austin that practice family law. Provided that you have not been served with a contempt and it is just an appearance, you can hire a family lawyer in Austin to appear at the hearing on your behalf. Good Luck.