The trivia item below may give away important plot points.
The corner that Greggs gets shot at shows the street signs "Longwood St" and "North Warwick Av". Although both Streets exist in West Baltimore, they never intersect. Although the show stays close to facts concerning the scenery in Baltimore, it might be intended to not give a too specific crime scene or it could be a diversion as Orlando informed Kima about; i.e. people switching the street signs.