Hundreds of people held candlelight march in Gurugram's DLF Phase 4 on Saturday, demanding justice for Sarthak Mattoo, who was killed in an alleged hit-and-run in Delhi's Vasant Kunj. Mattoo died on June 25 after a speeding Mahindra Thar allegedly hit his bike. His parents had alleged the accused's blood samples were collected 50 hours later, making alcohol detection unlikely.