On the night of May 25, 2016, 33-year-old Ronald McPhatter was fatally shot at the Irving Plaza concert venue in New York City. McPhatter, who worked as a bodyguard for rapper Troy Ave, was caught in a violent altercation that erupted in a green room area before a scheduled performance by T.I. Three other people were wounded in the chaotic scene, including Troy Ave.

In the immediate aftermath, police arrested Roland Collins, professionally known as Troy Ave; surveillance video from inside the venue appeared to show Collins firing a weapon, and he was charged with attempted murder and criminal possession of a weapon. Collins said he had wrestled the gun away from the initial shooter and acted in self-defense. Investigators later arrested Daryl Campbell, known as Taxstone, alleging he brought the gun into the venue and fired the shot that struck McPhatter, with Campbell’s DNA reportedly found on the firearm. Campbell was indicted on charges including second-degree murder.

What information about the sequence of events in the green room or the gun’s handling could help clarify who fired the fatal shot?