A bail appeal court will only interfere with a lower court's refusal of bail if it is satisfied the decision was wrong, involving either an irregularity or such unreasonable exercise of discretion as to vitiate the decision. The court must find that the lower court acted on wrong principles, allowed extraneous considerations to affect its decision, made mistakes of fact, or failed to consider relevant matters. An accused's conduct during arrest (fleeing from police, causing accidents while fleeing, hiding from arrest) constitutes relevant evidence that may properly ground a finding of flight risk. For purposes of a bail application, preliminary test results showing the presence of dangerous drugs, conducted in the accused's presence, constitute admissible evidence sufficient to establish a prima facie case. Concessions by investigating officers on legal questions do not bind the court, as the existence of a prima facie case is a legal determination to be made by the prosecutor and court.