While there isn't a specific "gadget" or "app" highlighted, the episode focuses on the following crucial investigative elements:
This episode is also notable for the of Officer Sean Roman, who learns his injuries might be permanent, preventing him from returning to full patrol duty. Chicago P.D. 3x22 "She's Got Us" Recap - Lady Geeks Media [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. While there isn't a specific "gadget" or "app"
: 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