The first question the film raises isn't about the murder. It's an issue that comes up with both Pacino and with Mamet today: are you getting the good or the evil twin?
I will say there is more than one wedding, more than one birth, more than one death, and eventually even a madwoman in the attic (not necessarily Downton's attic).
It is not at all unlikely that a reviewer could have had, could currently have, or could desire to have, a relationship with one of the entities involved in the very enterprise they're reviewing.