I killed Rory instead since he had been experimenting on me and because he told me I had to go back to the train at the end but instead of being free the person letting me go said I killed an innocent person and his partner said I had to go back.
I've tried killing a couple of characters, including an innocent person that I did not suspect at all: killed Ocean, killed Rory, killed creepy girl who said she wanted me to suffer but got the same (similar?) endings.
I'll try again. My next choices are: Tall Guy at the entrance to the chapel since he's the only person that wanted me there that's still around, the Chinese guy whose name is "???" (or Beck?), I'll try Rory's partner and I'll also try the people who seemed to know more than the others about me even though I think they are innocent (except for Tall Guy and Rory's partner, they are suspicious).