I was playing in co-op with a friend and we killed Evelyn in her lair.. well we went back to investigate and their is a zombie Evelyn in her place. We killed both Zombie Evelyn and normal Evelyn, but the main story is stuck on "go to Evelyn's house and look for clues about her lab." I'm not sure if its a bug or we just did things out of order and broke the game.
