33-10-135. Not guilty plea.If an accused after arraignment makes an irregular pleading, or after a plea of guilty sets up matter inconsistent with the plea, or if it appears that the accused has entered the plea of guilty improvidently or through lack of understanding of the plea's meaning and effect, or if the accused fails or refuses to plead, a plea of not guilty shall be entered in the record, and the court shall proceed as though the accused had pleaded not guilty. Source: SL 2012, ch 175, §116.
South Dakota Legal Code