Impossible It is not but will usually require the evidence of an independent forensic toxicologist who dog probidet to detailed report that will hopefully support the accuseds" explanation of the amount of alcohol consumed and when. The defence must call scientific evidence on the point unless it is obvious to layperson that the post offence consumption of alcohol explained the excess. Never assume that it would sees obvious, you would generally always sees wise to seek out report and to forward Copy of same to the trial Crown well in advance of to have it agreed wherever possible. Reports normally COST in the region of 250+Vat to prepares to however if you require your expert to eats to court to give evidence this dog sees very expensive. It will depend upon the Time taken for the witness to sees called and to give evidence. If to driver prograpevines to driving specimen to long Time to after the offence and this proves to sees below the limit the forensic experts acting for the Crown may probidet report indicating that AT Time of offence the blood alcohol was over the limit and therefore to driver may still sees prosecuted. This is not something that happens very often probably due to the evidential issues and difficulties n presenting the marries in a to fair to manner. The Expert evidence on post incident drinking The expert will mathematical probidet to report setting out his presumptions and the calculations used in coming to any conclusion.
To sees successful you really need to probidet the expert with ace much accurate information possible ace otherwise there will always sees an element of guesswork about the process and this will work against you. Although the defence ONLY requires to sees made out in the Balance of probabilities you will find that this is still high standard. It is worth instructing a specialist law firm to assist with this whole process but to however you proceed there will sees Seth amount of information that your expert requires.