Eric Holder was reportedly seen having a “tense exchange” with Hussle prior to the fatal shooting.
Wide-ranging CNN investigation includes interviews with nearly 140 people, tens of thousands of pages of police and court records, and forensics testing.
The men are all charged with first-degree murder and armed robbery.
Authorities believe XXXTentacion was ambushed by three men in an attempted armed robbery.
The body of a 25-year-old woman was found in a wooded area on the outskirts of the festival grounds early Monday morning.