The Central Bureau of Investigation (CBI)will today start its probe into the murder case of BJP MLA Raj Kishore Keshari. The CBI Joint Director Javed Akhatar said that a team led by agency’s superintendent of Police R C Chaudhary would visit Purnea today to start investigation. MLA Raj Kishore Keshari was stabbed to death by a private school teacher Rupam Pathak at his residence in Purnea last month.