: The case stalls when Birdie, the primary witness, refuses to cooperate. Frustrated, Upton eventually confronts Sean directly, sharing personal details about her marriage to get a lead, though Sean remains elusive and "one step ahead".
In , titled " Into the Deep " , Detective Hailey Upton is spiraling as she buries her grief over Jay Halstead's departure into a dangerous obsession with taking down Sean O'Neal , the son of Police Chief Patrick O'Neal. Key Plot Points Watch Chicago PD S10E07 WEBRip x264-ION10 1
: When actionable evidence finally surfaces, Upton brings the Intelligence Unit in, but they must work incognito to keep Chief O'Neal from discovering they are investigating his son. : The case stalls when Birdie, the primary
This episode is widely noted by reviewers at TV Line and Telltale TV for its focus on Upton's mental state and the high-stakes conflict of investigating a superior's family. "Chicago P.D." Into the Deep (TV Episode 2022) - IMDb Key Plot Points : When actionable evidence finally
: By the episode's end, Chief O'Neal learns of the investigation and remains in denial, while Sean becomes officially aware that Upton is coming for him.
: The team targets a man named Victor to get to Sean. During an undercover sting, Ruzek is forced to "pull the plug" when a young girl named Birdie is put in danger, leading Upton to shoot and kill Victor.
: Upton has been building a case against Sean in secret, suspecting he is running a sex trafficking ring targeting underage girls.