Authorities have said Mr Ephron met up with Mr Mayers on 6 November in 2021 a day after the pair got into a disagreement.
They met outside a Hollywood hotel about a block from the iconic Hollywood Walk of Fame.
Prosecutors say when the pair met things got physical. Mr Mayers is then alleged to have whipped out a gun from his waistband and pointed it toward Mr Ephron, telling him “I’ll kill you right now”.
Court documents outline that Mr Ephron told the rapper to fire the weapon, which Mr Mayers did not and instead started walking away.
Mr Ephron followed behind and yelled at Mr Mayers about their disagreements, court documents show.
That’s when prosecutors allege Mr Mayers pulled out the gun again and opened fire.
Court documents allege multiple bullets were fired, one of which is alleged to have grazed Mr Ephron’s knuckles.
Authorities say parts of the incident were captured on surveillance footage, including some footage that included audio of gunfire, though there is no video showing the shooting.
Some of this footage has been played in court already for jurors.