I am not sure if you have a question, but you need an attorney.
My comments are general in nature, are not legal advice as to your specific issue, and do not establish an attorney-client relationship. Disregard this solicitation if you have already engaged a lawyer in connection with the legal matter referred to in this solicitation. You may wish to consult your lawyer or another lawyer instead of me. The exact nature of your legal situation will depend on many facts not known to me at this time. You should understand that the advice and information in this solicitation is general and that your own situation may vary. This statement is required by rule of the Supreme Court of Missouri.
You absolutely need to speak with an attorney in a one-on-one consultation, not on an open forum like this. Good luck.
My statements are my opinion solely based on the information provided in the question, and that opinion can be inaccurate if the information is inaccurate, or if there are additional important facts that have been left out of that information. Always be careful about including any information in a public forum that could be used against you in any way.
Just based upon the information you shared I will offer this analysis. Yes, hire a DUI/DWI specialist attorney, not just any attorney.
First speeding and license plate light are not one of the NHTSA 24 driving clues for DWI Detection Phase One. That is good. See DWI DETECTION and STANDARIZED FIELD SOBRIETY TESTING (DD & SFST)
It seems he may have rushed through phase two of DD-SFST
Phase three are the standardized field sobriety tests and PBT; If the PBT was given you without a 15 minute observation period the results can be suppressed by a judge. On the walk and turn and one leg stand must be done in acceptable conditions.
The one leg stand is a timed test and should be terminated by the officer at 30 seconds.
It seems that there re issues in your case. Contact a qualified DUI/DWI attorney.
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