by Connorhere » Tue Nov 11, 2014 5:42 pm
I think Grisha did it like just a few days after Wall Maria fell, because i think i remember them saying that they were praying for the people of Wall Maria in the chapel before shit went down. Then i think he went home and injected Eren, i doubt it could have happened in the other order because i'm pretty sure Eren transformed right after he was injected, since that's what Rod's actions are implying will happen with Historia.