Arandor
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I still think that Drink's death on the first day was a suicide. The evidence you mentioned fits, and the burned-down house too. Maybe the clues were just very complex. In Might and Magic VI, almost nothing was solved.
Cash, why are you upset? If you believe the "cake theory," then in both cases, there's a lot of evidence (if you don't count it as one piece of evidence). There's the pearl, the triangles, the cake... it's unlikely that so much evidence would be given for just one suspect.
Be strong. Believe