Nation In Slender Man appeal, teen challenges decision to try her as adult when she was 12 January 7, 2019Bruce Vielmetti, Milwaukee Journal SentinelComments Off on In Slender Man appeal, teen challenges decision to try her as adult when she was 12 The appeal also argues that Morgan Geyser, who was barely 12, couldn't really understand what rights she gave up when she agreed to talk to police.