I'm quoting the article. It was written poorly but it indicates that in Detective Culpepper's testimony to the court Miles indicates he told Miller to bring his gun.
Finally, Culpepper said, police told Miles that all of it was caught on surveillance video from the Houndstooth Bar and it was then he admitted to being there during the shooting.
Culpepper said some of what happened was captured on dash cam from Miller’s vehicle.
After learning that, he said, Miles admitted to contacting Miller to bring him his gun and said Davis had gotten the gun from Miller’s vehicle.
I'm sure Miles had counsel present during the interview who advised lying would make his situation worse. Additionally I read texts were disclosed and in one of them Miller was supposedly told the gun was loaded. So the University may be spinning the story and perhaps some powerful political figures will get the detective to retract his testimony but as it stands now the court proceeding indicated things were more than just being in the wrong place at the wrong time.