Cheng Chieh (April 3, 1993 - May 10, 2016) or Zheng Jie, a death row prisoner in Taiwan. In 2014, he committed an unprovoked murder case on the Taipei MRT train, causing 4 deaths and 24 injuries. The Supreme Court of the Republic of China sentenced him to 4 death sentences for homicide and an additional 144 years and 6 months in prison.