He became an aggressor when he charged McMichaels. That changes the nature of the event from "Murder" to "Involuntary Manslaughter" - if that.
And yes, he ran about 60' up to the truck and took that hard left turn in front of the truck where he closed with McMichaels and attempted that shotgun grab. That is not a defensive move.
Remember that three shots were fired at close range after both men were wrestling with the shotgun and one man had a finger on the trigger. "Shots fired" is an expected result in such conditions.
Arbery seems to have been unaware that he has been shot until he brushes the shotgun barrel away, turns to run, and collapses from shock and blood loss.
What was he suppose to do, out run a hot head with a shot gun?
Yes. That would be the option with the best odds for success.
60’, I guess you think the truck is only 1 foot wide, it is all in aspect ratio of the capture, and it wasn’t a wide lens
Again, McMichaels was charge with aggravated assault, having the shot gun during his illegal citizens arrest/cop play time, got him that charge.
This was a defensive move, what else was an unarmed suppose to do when a stranger with a shot gun who just chased him down in his truck is demand that he “talks to him”? This is all self defense, you can not deny the man self defense just because you want to protect his hot headed wana be cop murderer.
It is that simple.
Murder
Pre meditated, because McMichaels grabbed their guns because they believe the man they were going to hunt down was armed and dangerous.
This scenario is exactly what the “citizen’s arrest” isn’t for.
Don’t go out play cop, and cry “self defense” when you shoot and kill your victim because your cop play time doing go as planned or was that the plan all along?
If so, they have serious civil rights violations