What we know about Payton Gendron, the white supremacist who killed 10 people in Buffalo On Sunday May 15, Payton Gendron opened fire in a supermarket in Buffalo, New York, United States. Of 13 victims, 11 were African Americans, and 10 died. What do we know about the author of this massacre? Find all the news, reports, surveys, opinions and debates of “l’Obs” on our website: https://www.nouvelobs.com/