If you are involved in an accident caused by a drunk driver, and can prove it, then you may claim damages in a civil lawsuit. You may also pursue a wrongful death lawsuit if a family member was killed in an accident caused by a drunk driver. In order to make your case, you will have to establish the intoxication level of the defendant, prove that this level was too high for safe operation of a motor vehicle, and show that the defendant failed to exercise reasonable care for the public's safety. Evidence used in such a case will usually include a police report of the incident, witness reports (if available), and expert opinions.
If you were involved in an automobile accident, particularly if alcohol may have been involved, you most likely will need professional help. Stephen P. Holmes can analyze the evidence and advocate for your best interests.