The Bihar police has today collected relevant informations regarding the sensational murder of BJP MLA Raj Kishore Keshari. AIR Patna correspondent reports that the police has also recorded the statement of the accused Rupam Pathak.Raj Kishore Keshari was stabbed to death by Pathak at his residence in Purnea yesterday. The family members of Rupam Pathak were interrogated pertaining to this murder case.The investigating team has decided to do brain mapping of Rupam Pathak to ascertain the reason behind the heinous murder. The different calls from mobile set of Rupam pathak are being deciphered.Chief Minister Nitish Kumar said that the guilty would soon be brought to justice. Meanwhile Police has decided to upgrade security for Ministers, MPs, MLAs and MLCs of the state. The mortal remains of the slain BJP MLA Raj Kishore Keshari were consigned to flames this afternoon in Purnea. On this occasion a galaxy of leaders including Deputy Chief Minister Sushil Kumar Modi, several ministers, MPs and MLAs were present.