The Cost of Nut Shells

Nut shell dioramas are incredibly important and valuable creations, not only for the advancement of forensic science, but literally their literal cost. Each case does have a solution, but it's kept confidential. Francis fears that if they're ever publicized, the nut shells would no longer be useful to police trainees. The exercise is strictly about having an open mind, accepting that there are unknowns, avoiding hastily made conclusions and above all else, being thorough and methodical at the scene of a death.