BJP MP Subramanian Swamy on Monday accused the Chandigarh Police of doing a “somersault” on a case involving the Haryana BJP chief's son, accused of stalking a woman, and said he would file a PIl in the Punjab and Haryana High Court for a court-monitored CBI probe into the incident. “With my associate lawyer AP Jagga on attempted abduction of an IAS officer's daughter by two drunk goons, I will file a PIl in Chandigarh,” he tweeted.