Conversation so far:
where did march for our lives come from
Following the Stoneman Douglas High School shooting on February 14, Cameron Kasky, a junior at the school, and his classmates, announced March for Our Lives four days later.
how many people died in the stoneman douglas high school shooting
On February 14, 2018, a gunman opened fire with a semi-automatic rifle at Marjory Stoneman Douglas High School in Parkland, Florida, killing 17 people and injuring 17 others.

Question: who was the shooter
Self-contained rewrite: who was the stoneman douglas high school shooter