That would be a whole new show, or require several more episodes for this one. Not that I would mind that, but that’s not the point of this show.
Shamelessly quoting myself.
@MBayGal, I respectfully disagree. The murder of Elena is the whole point of this show. Elena should have been developed as a whole person. Cut out the interminable scenes of Grace's walks, the close-ups of her darting bloodshot eyes, and the loving attention to her wig: hanging in her face! Blowing in the wind! Draped over the shoulders of her expensive coats! and there would have been plenty of time to tell us who Elena was within the six episodes.
Of course, that would require the tight storytelling that a mystery like this demands in order to be well done and satisfying to the audience. Instead we're getting a scattershot bunch of bullshit that seems unlikely to tie together in the end.