Taiwan executes subway slasher, random stabbing spree, Taipei Metro. 台灣處決地鐵殺人犯, 隨機瘋狂刺殺, 台北捷運

Horrifying attack: The student killed four people and injured 22 others in the attack on May 21, 2014
Taiwan executes subway slasher: Student killer who slayed four and injured 22 in underground knife rampage is put to death | Daily Mail Online
http://www.dailymail.co.uk/news/peoplesdaily/article-3584599/Taiwan-executes-subway-slasher-Student-killer-slayed-four-injured-22-underground-knife-rampage-death.html