Kishan Lal, who lived in Delhi's Tughlaqabad neighbourhood, was stabbed to death on a frigid February night in 1997, and the culprit was never found.
According to Arvind Kejriwal, political parties at the time "leaving no stone unturned to denigrate the Constitution's Independence."
According to state government sources, the CM was unable to join the trip returning from Germany due to an urgent health situation.