Whether it was before or after the shooting is still (apparently) unclear. (If that video was shot with a cell phone, they should very easily know when that call took place in relation to when the shooting took place)
https://www.tmz.com/2020/05/07/911-call-in-ahmaud-arbery-shooting/Edited by MIZ45 at 21:41:29 on 05/07/20