Evan of the past wasn't interested in history and didn't care much about learning about the events that took place in the past. However, even he knew about the event that happened 13 years ago, which had initiated the manhunt for the Cosmic Crusaders that has been ongoing to this day.
Evan just didn't know that Vera was a part of the group that had caused the ShadowFall Calamity; However, he knew who Vera was because of the visions he had last night that let him reexperience his past life and because of these very visions, he knew that Vera couldn't be left alive or thousands of innocents lives will be massacred at his hands in the future.
Thus, he had killed him ruthlessly without letting his emotions or humanity hold him back.
Evan's mind raced with thoughts as he justified his action.
'It's fine like this. I took a human life, but it wasn't the wrong thing to do. Vera's death is a good thing.'