No, because you don’t know what kind of case that you have and quite frankly, you really want a lawyer that’s familiar with the kind of situation that you have and that has handled those situations before and that has handled them with some success before.
So there’s really no reason to have an attorney on retainer because that attorney may not be familiar with the type of case that you have. So there’s really no need to hire an attorney before you find out what kind of a matter that you have.