[Jammin]

For scenario A, the attempted RDMer should be slain, not the detective. Traitor loses their round via detective but that's the innos fault, not the D.
Scenario B, no slay is appropriate for anyone.
Detective follows DNA so is immune from slay (unless extraordinary circumstances exist).

Thanks Tiefling for the drawings as I'm not reading all of that posted earlier.
I write books, not read em.