Apr 4 1968
Martin Luther King, Jr. is shot dead by a sniper in Memphis, Tennessee.

Apr 4 1988
Arizona Governor Evan Mecham becomes the first U.S. governor to be impeached and removed from office in nearly 60 years. He was convicted for obstructing justice by discouraging a state official from investigating a death threat, and also misusing $80,000 in public money. Mecham was known for rescinding the state's observation of Martin Luthur King, Jr. Day, requesting lists of state employees who were gay, and using the word "pickaninnies."