Speedy Wonder?!

I was the leader of the black people.
I lived in America.
I won the Nobel Prize of Peace.
I was assasinated.
Who am I?

Guess what my 3 nensei answered. "Speedy Wonder?" they answered hesitantly. The response from the JTE and me: "Ahahahaha!" Hah...it certainly sounds cooler than Stevie Wonder! But even that answer is wrong. The next group tried their luck, "Speedy Wonder" with a more confident Western accent, thinking that'll help make that answer right! : )

Perhaps the answer to that quiz below would be.......

I'm black.
I sing very well.
I'm blind.
Who am I?

Martin Luther King, Jr. (!!!!!)