PIERRE, S.D.—South Dakota Attorney General Jason Ravnsborg pleaded not guilty in an initial court hearing Friday for three misdemeanor charges he is facing for striking and killing a man with his car last summer. The Republican attorney general did not appear at the courthouse in Pierre, South Dakota, but his lawyer Tim Rensch made the plea on his behalf. The prosecutor noted that it is typical for defendants to plead not guilty at this point in the case before defense lawyers have a chance to look at the evidence. Besides the misdemeanor charges, the state’s top law enforcement officer is facing calls for his resignation from Republican Gov. Kristi Noem and law enforcement groups. But Ravnsborg has said he will not step down and —for now—maintains he is not guilty of breaking the law on the night of Sept. 12 when he struck a man walking on the shoulder of a …