The Murder Stone (2) (S01E06)

Gamache and his team delve into the core of the investigation, unearthing long-standing grudges and hidden truths within the Morrow family. Their pivotal discovery leads them to pinpoint the murderer. At the same time, Lacoste experiences a brief surge of joy from a significant advancement in the Two-Rivers case, but her excitement is quickly overshadowed by a devastating event that leaves her reeling.