 Shawn and Gus discover that Yin has actually committed each of the murders attributed to Yang, forcing her to assist him for years until she finally allowed Shawn to catch her.Yang had always longed for the perfect childhood she saw Shawn enjoying as a child, which Yin insists was far from ideal as the Spencers' marriage was collapsing and Henry ignored Shawn for work.Yin tells Yang that he was always there for her.