Ian Stuart McWalter Henderson, also known as Ian Stewart McWalter Henderson, CBE, GM & Bar, KPM (1927 – 13 April 2013) was a British citizen known for his role in resolving the Mau Mau crisis in Kenya in the late 1950s and for managing the Bahraini General Directorate for State Security Investigations from 1966 to 1998. Henderson was dubbed the Butcher of Bahrain due to torture and the numerous human rights violations that were alleged to have taken place under his command there, especially during 1990s uprising in Bahrain.