The first step is to find out where the person was drinking at that night. There could be several such places. The police report may have the information, but if it doesn’t, interviews need to happen. This often includes interviewing the driver (many times in jail). Next, the lawyer collects all the evidence needed to prove how many drinks were served to the customer. Surveillance video, credit card receipts, eyewitness accounts, and cash register receipts typically reveal what happened. Even this, however, may not tell the whole story, as the customer may have had drinks purchased for him/her by friends. Finally, we hire an expert to objectively review all the evidence to determine if the bar/restaurant knew or should have known the customer was intoxicated at the time.