By Amendment VI and similar provisions in the state constitutions the accused has the privilege of compulsory process for obtaining witnesses in his favor, that is, to have the machinery of the law employed in his behalf, as it may be employed in behalf of the prosecution, for the purpose of bringing witnesses into court and compelling them to testify. There is nothing exceptional, however, in this requirement, for in all cases tried in a judicial tribunal the parties are generally entitled to have compulsory process for securing the attendance and testimony of witnesses. In civil cases the party desiring the attendance of a witness may be compelled to pay or tender his legal fees, and perhaps in the absence of statutory provision this is true also as to the accused in a criminal prosecution, but it is generally provided by statute in the interest of justice that witnesses may be subpoenaed for the accused at the expense of the county, upon approval by the court, so that the accused in a proper case may secure the attendance of witnesses in his behalf without advancing or tendering their fees.