ACUDB - Assassination of Louis-Michel Le Peletier

A noble by birth, Michel Le Peletier de Saint-Fargeau was an ardent defender of the people's cause and symbolically relinquished his titles of nobility. In June 1790, he became president of the National Assembly. On January 20, 1793, he cast the deciding vote for the death of Louis XVI, but only after a great deal of hesitation.*
* Well, I should think so!
On the very evening of the vote, Le Peletier was killed under mysterious circumstances at a café in the Palais Royal. Contemporary sources credit a former Royal Guardsmen as the killer, but the exact identity of the murderer remains mysterious to this day.