the attacker had a bullet - proof vest under his clothes and a backpack containing a knife , an axe and a fake knife . two other knives were find near the crime scene . the prosecutor confirmed that the woman ' s face was painted white with pierced features as he committed the attack , which led international media to take comparisons to the joker , the joker from the batman series . " i have a request , " the killer reported the first employee he found , after having he immediately stabbed her , and started his rampage . two female girl caring worker attempted to disarm the killer while some locked the doorway . the killer stabbed employees trying to carry victims to safety .
Joker appears in the Batman series.