The petition for the writ verified July 17, 1964, was venued in the District Court of Washington County. In substance, it asserts that the defendant entered a plea of guilty to the crime of robbery in the second degree when arraigned and charged by information with having committed the crime of robbery in the first degree; that he was not guilty of the offense charged in the information or the lesser offense to which he pleaded guilty; and that the plea entered by him was not voluntary.