Station Platform) On the evening of 21 May, people began leaving flowers and cards at an exit of Jiangzicui Station to pay tribute to those who died in the attack. On 22 May, President
Ma Ying-jeou condemned the attack and ordered the
National Police Agency to investigate what led a university student to stab four people to death on a crowded subway train. The
Legislative Yuan on 23 May released a joint statement signed by all political parties calling for the National Police Agency to thoroughly re-examine and increase police deployment on metro systems, railways and airports. Taipei Mayor Hau Lung-bin announced that police officers from precincts in Taipei and New Taipei City are to be permanently deployed at each of the Taipei MRT commuter rail system's 109 stations. General manager Tan Gwa-guang of the Taipei Rapid Transit Corporation stated that the company would pay the medical expenses of the victims and set aside NT$4 million to compensate their families.
Taipei City Government also raised funds to use as compensation.
Tunghai University, where Cheng was a student, expressed sorrow at his actions and stated that "No matter what, Cheng will always be our family," urging students to show care for one another. They also promised to set up an expert committee to investigate the environment at the college. Kuomintang legislator said the passengers had put themselves in danger by focusing on their
smartphones, while another KMT legislator,
Lin Te-fu, said the passengers should have quickly pressed the emergency alert button in the train and that the passengers lacked common sense. These remarks sparked a public outcry against the legislators. The incident has sparked a debate online about whether the death penalty is appropriate punishment for such attacks. A Facebook group named "Indefinitely supporting death penalty for Cheng Chieh" had over 32,000 "likes" as of 22 May 2014. , executive director of the Taiwan Alliance to End the Death Penalty, said that the most important thing at present is for the public to think about how to help the victims of the metro slashing spree and ease the survivors and their relatives out of the suffering brought about by the tragedy. On 27 May, Cheng Chieh's parents publicly apologized at Jiangzicui Station and called for a quick death sentence for their son. Cheng's parents told the media that he liked to play violent fighting games, and when he was interrogated by the police, Cheng said that the games he liked to play were
League of Legends and
Tower of Saviors, both of which are "fighting type" video games; the Taiwanese operational team for
League of Legends issued a statement saying that its game had nothing to do with Cheng's motive for the murder, and the company behind
Tower of Saviors also stated that the product is a
match-three game, which had nothing to do with the crime. ==Trial==