Late in Season 4, Ella revealed to Chloe that she was in the midst of feeling like the cops and other law enforcement were the only ones who could really hold people responsible when they do bad things, because she no longer believed that Heaven and Hell were real.
Having said that, though, we did see Ella have some big doubts about her life-long faith in God and the afterlife in Season 4 (which made an impressive debut on Netflix earlier this year after being cancelled at the end of Season 3 by Fox).