the attacker wore a bullet - proof vest under his clothes and a backpack including a pistol , an axe and a fake rifle . two other knives were discovered near the crimes site . the prosecutor said that the attacker ' s hand was painted white with blackened hair as he committed the offence , which caused worldwide media to make compare to the joker , the hero from the movie series . " i have a question , " the killer accused the first customer he encountered , after which he immediately stabbed her , and started his rampage . one young night care worker sought to disarmed the killer while others opened the doors . the killer stabbed people failing to ferry children to safety .
Joker appears in the Batman series.