Do it now!
While you can call a lawyer anytime, it is best to consult with a lawyer as early in the process as possible. The earlier you get a lawyer on your side the more likely he or she will be able to help you.
Criminal laws and procedures are complex. What may seem unimportant to you may be of critical importance to an impaired driving lawyer. Something you think is a small point may be the very thing that prevents you from being convicted.
Evidence needs to be preserved. An impaired driving lawyer will let you know what that evidence is and how it should be collected. For example, documents like bar tabs and credit card receipts may be easy to obtain now, but impossible to obtain later. This kind of evidence could be crucial to your defence.
Witnesses should be identified and contacted while their memories are fresh. There may be people who saw or talked to you who can testify that you did not appear impaired. They should be interviewed, and witness statements should be taken from them to preserve their memory of events.
The bottom line is; don't wait until it's too late!
