CBI on Thursday registered a case against BSP MLA Purushottam Dwivedi and four others in the alleged rape of a minor Dalit girl in Banda district of Uttar Pradesh.The Supreme Court on September 12 had directed the CBI to take over probe into the case as allegations were leveled that Dwivedi being a ruling party MLA used his influence in the administration to dilute the probe.The case was earlier registered by the local Police and later was investigated by CB-CID. The 17-year-old Dalit girl was allegedly raped by Dwivedi in Banda on December 10 and 11 last year.The girl, however, was arrested after allegedly false charges of theft were levelled by the legislator's brother against her. 48-year-old Dwivedi, who was later arrested from Banda and suspended by Mayawati's party, denied all the charges.