Rajya Sabha MP Kapil Sibal on Monday lashed out at the government over the killing of a Tripura student in Dehradun in an alleged racist attack and urged Union Home Minister Amit Shah to speak up against hate crimes. The Independent Rajya Sabha MP said the incident was a shocking display of a hate crime, bigotry and the "silence of leaders in government who by their inaction are complicit". According to police, 24-year-old Angel Chakma, a resident of Unakoti district of Tripura, and his younger brother Michael had an argument with Suraj Khawas (22), a resident of Manipur currently living in Dehradun, and his five friends in Selakui market on December 9. The accused allegedly attacked Chakma with knives and brass knuckles, and the 24-year-old succumbed to injuries at the hospital on December 26. Angel's father, Tarun Chakma, who is posted in Manipur with the Border Security Force, alleged that "racial slurs" were hurled at his son by the accused, who called him "Chinese". In a post