Former Deputy Commander at the General Service Unit (GSU) William Singoei was on Wednesday found dead in a room in Embakasi.
The incident was confirmed by Regional Police Commander Augustine Nthumbi who revealed that his juniors had been trying to reach him on phone since Tuesday to no avail.
Upon going to his room, he was found unconscious with a glass of water and some medicines found at the scene.
The cause of his death is yet to be established.
His body has since been transferred to the mortuary with a post mortem expected to be carried out later on.