On April 13, 2017, a MARTA Blue Line commute in Atlanta ended in violence when 37-year-old Zachariah Hunnicutt was shot multiple times and killed aboard a train traveling from Hamilton E. Holmes toward West Lake. The shooting also wounded three other passengers. Riders scrambled as gunfire erupted; the train reached West Lake station and officers detained 36-year-old Chauncey Lee Daniels as he tried to leave. A firearm recovered at the scene was believed to be the weapon used.

Investigators described the attack as targeted rather than random. Hunnicutt and Daniels were former coworkers, and witnesses and family members reported a history of conflict between them. Daniels was arrested and charged in connection with the incident; surveillance footage from the train was part of the evidence presented during prosecution.

Did anyone on that Blue Line train or nearby that afternoon notice anything unusual in the lead-up to the shooting?