You have to be a government vulture?
Yes, flags were lowered for Martin Luther King Jr. after his assassination in 1968, when President Lyndon B. Johnson issued a proclamation ordering the U.S. flag to be flown at half-staff on all federal buildings, naval vessels, and U.S. facilities abroad.
Proclamation 3839—Death of Martin Luther King, Jr.
I direct that until interment the flag of the United States shall be flown at half-staff on all buildings, grounds and naval vessels of the Federal Government i...
The American Presidency Project