In order to recover damages in a drunk driver accident case, you must be able to establish that the drunk driver was negligent and that the negligence was the reason for the damages sustained. If it can be proven that the driver was in fact intoxicated, this is typically simple to establish. Sometimes, intoxication is not as easy to prove due to the absence of clear evidence.
An experienced attorney will know what types of evidence are needed to prove intoxication and establish the necessary legal elements. An attorney will know where to find important evidence and may even be able to obtain evidence held in the possession of the drunk driver.