Case open
Murder at Ravenshollow Manor beat somebody today.
They ran out of questions before they ran out of suspects. The case is still open, and the contradiction is still provably in there.

Classic Whodunit · 1927, an isolated country estate in the Yorkshire Dales
Murder at Ravenshollow Manor
A storm has cut the manor off from the world. Lord Ravenshollow lies dead in his library — and everyone under this roof had a reason.
3 suspects · medium · 45–60 min · free
Nothing on this page gives anything away — it knows whether the case was closed and nothing about how.