case boucher case a commitment under a warrant which do not specify the crime  the party be charge with be false imprisonment and therefore if a sergeant at  mace justify a arrest by command of the mayor his plea must show in certainty  for what cause the arrest be make post cro car show c p Carth stram b r h will  hale hale burr burr hawk p c lose saint Tr hawk p Cowp dougl term Rep false  imprisonment the defendant justify a for that the city of London be a ancient  city and that sir Robert lee be mayor and justice of the peace within the say  city command he be a sergeant of the mace pro to visit cause eiden mayor bene  cognit to imprison the plaintiff per quod c and so justify and it be thereupon  demurrer the first exception be because it be not show that the mayor be  justice of peace by prescription or by charter second because he justify the  arrest by the mayor command which be out of his presence ought not to be  without warrant as Henry be three because he justify the arrest by the mayor  command pro that which is fixed cause know to the mayor which be not good for  he ought to show the cause of the imprisonment so as the court may adjudge  whether it be lawful or no otherwise there be no cause of justification  Montague recorder answer that although such justification ought to be for the  mayor himself in such case because he ought to show good cause of  justification to the court he be privy yet the sergeant or officer be not  privy and therefore his authority be not to be examine upon his imprison any  by the mayor command but all the court hold that for this point principal the  plea be not good for although the mayor or magistrate may send for any to  examine he and be not bind to show the cause in his warrant nor the officer be  to know the cause for peradventure it may be for treason or felony which if it  shall be discover the party may thereby escape and the examination shall not  be make and justice be thereby defraud yet when he be bring croak throw before  the mayor and commit to prison then the cause be discover and when one be  implead in a action he ought to show the cause otherwise the plea be not good  the other exception they do not much regard and judgement be give for the  plaintiff