One of two girls convicted of stabbing a classmate to please the horror character Slender Man asked the Wisconsin Supreme Court on Friday to rule that the case should have been tried in juvenile court.Morgan Geyser and Anisa Weier attacked their friend, Payton Leutner, in a Waukesha County park following a sleepover in 2014. Geyser stabbed Leutner 19 times, as Weier encouraged her, leaving the