Chicago_p_d_s07e01 -

: Hank Voight is initially the prime suspect because his SUV was spotted near the crime scene. However, the investigation eventually shifts toward Katherine Brennan , Kelton's former right-hand woman, who is revealed as the killer.

: While actor Jon Seda does not appear, his character’s departure is addressed offscreen. Voight reveals he was helping Antonio get to an off-the-books clinic to deal with his drug addiction, which explains his whereabouts during the murder. Chicago_P_D_s07e01

In the Season 7 premiere, titled " Doubt ," the Intelligence Unit deals with the immediate aftermath of Mayor-elect Brian Kelton’s murder. The episode serves as both a resolution to the Season 6 cliffhanger and a departure for a original cast member. Key Plot Points : Hank Voight is initially the prime suspect