He was a member of the Kapenguria Six, along with Bildad Kaggia, Jomo Kenyatta, Fred Kubai, Paul Ngei, and Ochieng Oneko.
Kungu Karumba along with five other men, including Jomo Kenyatta, were arrested on October 20, 1952 in Kapenguria by British colonial governor, for being involved in a revolutionary group called the Mau Mau, which led a revolt against British colonial rule.
He loaned a substantial sum of money to the wife of Ugandan military commander Isaac Maliyamungu, but she did not pay back her debt.
[5] As a business man, Kung'u Karumba invested in the transport industry where he owned a fleet of long distance vehicles.
[3] A popular musician at the time, Daniel Kamau, wrote a song entitled 'Where Did Kung'u Karumba Disappear To?