Punjab Minister Navjot Singh Sidhu's wife Navjot Kaur has been given a clean chit in a Punjab government-appointed magisterial probe into the Amritsar train tragedy on Dusshera evening in which 60 people died, sources said on Thursday. The probe, conducted by Jalandhar Divisional Commissioner B. Purushartha, has indicted Saurabh Madan Mithoo, the son of Congress councillor in Amritsar and a close political aide of the Sidhu couple, and officials of the Amritsar Municipal Corporation, local administration, the police and railway authorities for lapses that led to the tragedy.