the attacker wore a bullet - damaged vest under his clothes and a backpack containing a knife , an axe and a fake pistol . two other hands were hidden near the crime scene . the prosecutor confirmed that the killer ' s profile was painted white with blackened eyes as he committed the crime , which prompted international media to make comparisons to the joker , the villain from the batman series . " i have a question , " the prosecutor reported the third employee he approached , after which he immediately stabbed her , and started his rampage . one female day shelter worker attempted to disarm the killer while others lock the doors . the attackers murdered employees trying to lead children to safety .
Joker appears in the Batman series.