For a deeper look into the intense hunt for a cop killer, you can watch the overview of the PD True episode on this subject:
: Commissioner Frank Reagan mobilizes the entire NYPD to hunt down the killer, feeling the weight of the "blue wall" and the personal toll of losing one of their own. [S1E4] Officer Down
In this episode of the Apple TV series, the Reagan family faces a crisis when an off-duty police officer is murdered during a diamond heist. For a deeper look into the intense hunt
: Danny Reagan leads the charge on the ground, navigating the high-pressure environment where every cop is on edge. [S1E4] Officer Down