What are Everyone's Thoughts/Theories on Who the Shooter is?

With only 3 episodes left, I would love to hear everyones theories on who the shooter is. Im having a debate with my friend and we feel like it could be anyone at this point. What do ya'll think?

With only 3 episodes left, I would love to hear everyones theories on who the shooter is. Im having a debate with my friend and we feel like it could be anyone at this point. What do ya'll think?