A post-mortem report revealed that the blogger had been tortured before being strangled.
The suspects lured Muthiani to his death by promising to arrange a meeting with Governor Mwangaza.
Two suspects are to be charged with murder in Kiambu High Court on Friday in connection with the torture and death of Meru blogger and political activist Daniel Muthiani alias Sniper.
Meru Governor Kawira Mwangaza's brother Murangiri Kenneth Guantai and Vincent Murithi Kirimi will appear in the High Court to face murder charges.