The EOW has registered a case against Kalpna Gupta, wife of Sandeep Gupta and proprietor of Kalpna Udyog, Rewa; Sandeep Gupta; Rupesh Kumar Singh, proprietor of Electric and Machinery, Rewa; Santosh Kumar Verma, proprietor of Arvindo Tech Infra, Rewa; and Ankita Singh, proprietor of Arvindo Tech Infra, Rewa.