Pierce Boykin was arrested days after De'Von Pickett, aka Day Day, was fatally injured outside a bar in Philadelphia.

A second member of Minaj's tour personnel, Eric Parker, also known as Eric Reese, sustained stab wounds, but survived.

Boykin was subsequently slapped with a slew of counts, including murder, attempted murder and aggravated assault, and he appeared in a Philadelphia court on Tuesday (28Apr15) for a preliminary hearing.

During the court session, musician Marcus Kincy testified against the 31-year-old suspect, revealing he, Pickett and Parker were drinking at Che Bar and Grill and moved outside near closing time after a fired employee caused a disturbance inside.

Pickett approached a female employee to make sure she was OK and offered to walk her safely to her car.

Kincy claimed one of Boykin's pals took issue with the exchange and stepped up to them, adding, "And that's when things sort of got out of hand."

Kincy crossed the road to get away from the brawl, but when he returned minutes later, he found Pickett lying on the ground, unresponsive.

Parker also took the stand and recalled tussling with Boykin before he was able to run away. He alleged Boykin chased him and yelled, "When I catch you, you're going to be dead just like your man."

Parker didn't realise he had been stabbed until he arrived at Albert Einstein Medical Center with Pickett, reports Philly.com.

Minaj's crew were in Philadelphia rehearsing for her current tour.