The confession of one of two girls accused of stabbing their friend in 2014 for the character “Slenderman,” will be allowed in her trial, officials confirm. FOX 6 reports Anissa Weier, now 15, reportedly admitted to police that she stabbed then-12-year-old Payton Leutner, in 2014. Anissa’s lawyers argued to have the confession thrown out, but Waukesha County …