respectfully, that will not be the case. After watching episode 4 several times - and the whole answer came into focus. I love mysteries and solving them: a woman is not the killer. I won't spoil it for you but if you re-watch Episode 4, the answer is there!
Kerry meets Egyptian officials in bid to assuage concerns over Iran deal (AP)
from the article: Killer show: 'True Detective' rises above genre