Anton Lundin Pettersson is a 21-year-old student who attacked Kronan School in Trollhättan, Sweden, with a sword. He killed a teaching assistant and a male student, stabbed another male student and a teacher, and died later of the gunshot wounds he received during his apprehension. The second teacher who was wounded died in hospital six weeks after the attack, on December 3rd.
He is known as the "Darth Vader" killer because he wore a mask that is similar to Darth Vader and said the character's line "I am your father".