When do you think

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I thought maybe it was at the opera.

Pazzi wasn't trying to turn him over to the police, he was trying to turn him over to Mason Verger for the reward.

But anyway, I'm not quite sure the exact point at which Dr Lecter realised that Pazzi knew who he was but I think that he was generally wary of Pazzi from the start because he (Pazzi) was investigating the death of his (Lecter's) predecessor which I think Lecter was responsible for (it doesn't say so in the film and I can't remember whether or not it does in the book) so either way, it was likely that Pazzi would start investigating him one way or another sooner or later.



She'll come back as fire to burn all the liars, leaving a blanket of ash on the ground