Like any legal case, there is certain evidence that must be presented in support of an argument. Which pieces of evidence are offered shall differ depending on which side of the case is being presented.
A prosecutor will be looking to prove two different elements. 1) the person being charged was driving and 2) they were under the influence. In order for Prosecution to establish their case, they must present evidence that supports these two elements. Most often, the evidence presented will be pretty standard in DUI cases.