TAIPEI: Taiwanese prosecutors on Monday said they were seeking the death penalty for a man accused of killing four people and wounding nearly two dozen others in a stabbing spree on the Taipei subway that shocked the island. Cheng Chieh, a 21-year-old college student, was charged with four accounts of murder and 22 accounts of attempted murder for the fatal attack on May 21, the first of its kind on the city’s subway system since it began operating in 1996. “The accused’s actions fit the definition of mass murders, his means were ruthless and inhuman, and caused irreparable harm to the victims and their families. We demand the court sentence him to death,” prosecutors said in a statement. Cheng’s parents had asked for him to be sentenced to death to help ease the pain inflicted on the victims and their families, calling their son’s actions “unforgivable.” Executions are carried out in Taiwan by a single shot to the heart from the back — or, if the prisoner agrees to donate his organs, a bullet to the back of the head.