During this process, student deaths were a common occurrence; some indeed resulted from accidents, like jar explosions, suffocation, or mental breakdowns upon waking up prematurely. Of course, some were akin to lynchings. For instance, out of jealousy for a particular girl's beauty and intelligence, she might be falsely invited to join the society, then buried alive.
In any case, if the life detection chip's signal disappeared, or if the anonymous vote within the Greenfield Club resulted in 'rejection,' then there was no need to exhume the jar under the cherry tree.
Most of those who had recently killed themselves were members of the Greenfield Club, and since the 'gold' status membership was on the top secret list of three departments, only internal members could obtain everyone's identity.
