MADISON, Wis. (AP) — A Wisconsin woman who admitted to nearly stabbing a classmate to death in 2014 to please the online horror character Slender Man is missing after she cut off an electronic monitoring device and left a group home, authorities said Sunday. Madison police issued an alert Sunday for Morgan Geyser , now 23, saying she was last seen around 8 p.m. Saturday with an adult acquaintance. “If you see Geyser, please call 911,” the alert said, adding that she had cut off a “Department of