Got Us - [s3e22] She's

: Antonio and Olinsky investigate Horizons , a pyramid scheme/self-help group that the victims were involved with, looking for potential suspects.

: Polly mentions a specific location she needs to visit, which becomes the primary clue leading the team to a breakthrough in the case. [S3E22] She's Got Us

In the Chicago P.D. episode (Season 3, Episode 22), a significant "useful feature" or plot device is the traumatized young survivor, Polly Carlson , who is the key to identifying the killer after her family is murdered. : Antonio and Olinsky investigate Horizons , a

: Dr. Daniel Charles is brought in to help Lindsay and Halstead connect with Polly, who is disoriented and heavily traumatized. : Antonio and Olinsky investigate Horizons