Related to the above, one thing that wasn’t clear to me was whether the first three clues should be sufficient to identify the killer. From a game play perspective, I don’t think that matters because the theoretical high score (assuming you solve it without randomly guessing) could just be lower if you need extra clues for that problem due to the first three not being sufficient. However I couldn’t tell if I was being dumb or I didn’t have enough information.
You are right, it is very very unlikely that the first three clues are enough to identify the killer in any reasonable scenario. The ranking is still very preliminary and it will be improved very soon.