The Supreme Court Thursday enhanced the punishment for Congress leader Navjot Singh Sidhu in the 1988 road rage case and sentenced him to rigorous imprisonment for one year. A bench of Justices A M Khanwilkar and S K Kaul allowed the plea filed by the kin of Gurnam Singh, who lost his life in the incident, seeking review of the top court’s 2018 order by which it had let him off with just a fine of Rs 1000.