Felony DUI cases can quickly become difficult to defend against. The prosecution will often seek more evidence for a felony case than a municipal or magistrate-level DUI. This can include witnesses to testify to impaired driving, bank or credit card statements to show charges at a bar or restaurant, or bar receipts or other evidence of drinking recovered by law enforcement officers.
The best thing you can do to help your case is to seek legal counsel as soon as possible. A skilled DUI lawyer may be able to prevent the admission of evidence such as breath or blood samples or demonstrate through medical records that the injuries sustained do not reach the level necessary to qualify a felony case. Hiring a defense attorney quickly will give them more time to build effective defenses for your case and give you the best chance in court.