Director of Prosecutions Keriako Tobiko has directed Inspector General of police Joseph Boinett to investigate the conduct and utterances of Nairobi Senator Mike Sonko Mbuvi during during a burial ceremony in Ukambani yesterday. Sonko who caused chaos at the burial prompting CORD leader Raila Odinga to leave prematurely, also declared himself as acting president of the republic of Kenya, a declaration that has caused uproar among Kenyans.