I actually saw some background on Kwanza this morning in a non-related issue. So I did a bit more quick digging on the interwebs, and according to the ever-reliable wiki, the Kwanzaa founder's name is "...Maulana Ndabezitha Karenga (born Ronald McKinley Everett, July 14, 1941), previously known as Ron Karenga..."
In 1971, he was convicted of felony assault, torture, and false imprisonment. He denied involvement and claimed the prosecution was political in nature."
I'm always a bit suspicious of people who change their name a couple of times. It proves nothing that he did, but still.
And yes, he's done time.