Drunk drivers are the scourge of the road. They cause untold devastation. Then, after they have left their trail of devastation, drunk drivers leave their mess to an insurance company to try to paper over the harm.
Unfortunately, insurance companies do not really care whether their driver was a drunk. They will still try to pay the lowest amount possible to the injured and dead victims of drunk drivers. It is a numbers game to them.
You will need a team of professional investigators, blood alcohol experts, accident reconstruction experts and life care experts. Your legal team will need to preserve as much of the evidence as possible. Your legal team will need to interview witnesses as quickly as possible so as to get their most vivid and reliable recollection.