On the hearing of a petition under this subtitle, the court shall presume that the action of the local licensing board was proper and best served the public interest. A petitioner has the burden of proof to show that the decision of the local licensing board being reviewed was: against the public interest; and not honestly and fairly arrived at; arbitrary; procured by fraud; unsupported by substantial evidence; unreasonable; beyond the powers of the board; or illegal. A review of a decision of a local licensing board under this subtitle shall be heard by the court without a jury. The court may hear additional testimony to the extent and in the manner that is necessary if, in the opinion of the court: it is impracticable to determine the question presented to the court without the hearing of additional evidence; a qualified litigant has been deprived of the opportunity to offer evidence; or the interests of justice require that further evidence should be taken.