Matthew Bryan Deitsch (born October 4, 1997) is an American writer, gun violence prevention advocate and political advisor. Before entering politics, he worked in broadcast media and was a freelance photographer, film director and music producer. After the 2018 Stoneman Douglas High School shooting in which his siblings witnessed, Deitsch became chief strategist for the March For Our Lives protests and began advocating for gun violence prevention. He is the older brother of activist Ryan Deitsch.