Kevin has harbored deep resentment toward his father for leaving him to raise his younger siblings alone after Lew went to prison for an armed robbery.
Through the investigation, Kevin learns new truths about why his father never allowed him to visit in prison—Lew didn't want Kevin to see him in that state and felt he was protecting him. It is also revealed that Lew may have taken the fall for others during the original robbery that sent him away. Key Character Moments Chicago PD Season 10 Episode 11 Review: Long Lost Chicago P.D. Season 10 - Episode 11
Intelligence discovers that Lew might have information about the shooters. Voight encourages Atwater to bridge the gap with his father to get the truth, leading to uncomfortable and raw conversations. Kevin has harbored deep resentment toward his father
The investigation takes an unexpected turn when Atwater realizes that a key witness—and potential person of interest—is his estranged father, (played by Erik LaRay Harvey), whom he hasn't seen in years. Key Character Moments Chicago PD Season 10 Episode