I watched this having watched the film in which Eddie Redmayne started as Charles Cullen.
I'm glad I did it this way round, so many things I found hard to believe in the film, were actually true, the film wasn't sensationalised, it seemed to stick quite rigidly to the content.
What a documentary should be, thought provoking, dramatic, revealing, and a little bit shocking, some parts of it were actually hard to fathom, that is one messed up system.
Amy Loughren's thoughts were astonishing the whole way through, once again, I'm speechless at how rotten the establishment was, how many lives could have been saved.
One thing the film didn't really get into was Cullen's motivation, you will actually hear that in his own words here, the interview sequences were astonishing I thought. What a curious guy, I'd like to see more on him, to try and understand him a little better, he's impossible to piece together.
8/10.