Q posted a chat log. Is this shooting what they were potentially talking about?

https://www.google.com/url?sa=t&source=web&rct=j&url=https://en.m.wikipedia.org/wiki/Santa_Fe_High_School_shooting&ved=2ahUKEwimtu756ozpAhXklOAKHcg6D-4QFjAAegQIBBAC&usg=AOvVaw2x5RfYvogMO1CfbzL5kEd4&cshid=1588135883234