Ashlee Gillespie

After a case languishes in the Jane Doe category for a year, a girl asks for the team's help finding her older sister, a teenage Amish girl who disappeared weeks after leaving home to go to Philadelphia and experience the outside world as part of Rumspringa, an Amish right of passage. Rush and the others reopen the year-old case.

Mac investigates the murder of a woman outside a floral shop and, shortly after, a man located two buildings down is found dead. With two murders two buildings apart, the CSIs must figure out if only one killer is behind both deaths. (TV-14)

When the backpack and ID of missing college coed Skye Petersen are suddenly dropped off at a thrift store seven years after Jack - and ultimately the legal system - determined she was murdered by her married professor with whom she'd just ended an affair, the team decides to reopen the case. Jack fears that he may have elicited a wrongful murder confession during an intense interrogation with the professor. The thrift store's grainy two-day-old security video shows Skye's belongings being left by a woman who looks remarkably like Skye. As the team reinvestigates this formerly high-profile case, Jack is especially eager to learn the truth, despite knowing that this new evidence may uncover a tragic mistake on his part that has already cost the professor seven years in prison.