Ex-DCI officer Ngisa dies after illness in Nyamarambe, Kisii   Among others, Ngisa served as the head of Directorate of Criminal Investigations at Jomo Kenyatta International Airport before retiring in 2016. He was of the rank of Assistant Inspector of police at the time of his retirement, his colleagues and family said.He died at a … Continue reading A Former Senior DCI Officer Joseph Ngisa Is Dead.