The party would step up its offensive in the case, sources said. This week Dr Anand Rai, a whistle blower in the Vyapam case, was apparently put on defensive by BJP spokesperson Sambit Patra by alleging that he was involved in a murder case. The BJP is expecting a tough Monsoon session of Parliament, beginning July 21, with Congress and some other Opposition parties gearing up for their campaign for resignations of Rajasthan Chief Minister Vasudhra Raje, External Affairs Minister Sushma Swaraj - allegedly linked with the lalitgate- and that of Madhya Pradesh Chief Minister Shiv Raj Singh Chouhan. The Chief Minister has already dismissed Congress demand for his resignation in the Vyapam case.