Common sense dictates they both abused her, and both were involved in her death.
I say this because both were involved in staging. Neither would willingly protect the other so there has to be mutual guilty knowledge for them to collaborate.
The details don't really matter to me, who tied what where. I think they are both responsible and PR at least has not escaped judgement.
ETA: if she was as religious as she pretended to be, she must've been terrified when she died.