The Number of Rats
Benson has traveled into Chicago to help Voight and intelligence with a rape/murder case that is frighteningly similar to a case from New York a decade ago. She calls in Fin and Amaro to assist. The prime suspect, Yates is let go after rigorous questioning. He then requests a meeting with Lindsay and he warns of unintended consequences from what intelligence is doing.
(We Called Her Jellybean (1) aired on Chicago Fire, season 3, episode 21. Daydream Believer (3) aired on Law & Order: Special Victims Unit, season 16, episode 20.)