the attacker held a bullet - resistant coat under his clothes and a pouch containing a knife , an axe and a fake pistol . ten other tools were detected near the murdered scene . the detective told that the assassin ' s face was painted white with black skin as he committed the crime , it led australian authorities to have citations to the joker , the protagonist from the batman series . " i have a question , " the man told the first employee he encountered , after which he simultaneously stabbed her , and started his rampage . another female day care worker attempted to disarming the shooter while someone lock the doors . the killer stabbed employees helping to carry students to safety .
Joker appears in the Batman series.