There could very easily have been a mistake on the form you signed when you had the car towed.
It could easily have been 01:18, and not 02:18.
When you say "what is my legal recourse", what do you mean? Recourse against who?
If you were not under the influence, you can obviously defend the matter and the prosecutor will have to prove, beyond a reasonable doubt, that you were not under the influence of alcohol, or the alternative charge that your blood alcohol level was not over the limit.
There are a number of things that they need to prove, amongst them that your blood was taken within 2 hours of the incident. I assume that this is where you are going with the question. But, the sigining of the towing firm's form will not really prove or disprove anything. The person who took a blood sample would have certainly made a note of the exact time when the blood was drawn, and that time is the crucial time.
I hope this answered your question.
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