Arbery was 10 miles from home.
"Jogging" in cargo shorts (what a way to get nasty abrasions) and work boots
Gregory McMichael and Arbery knew one another from his shoplifting charge that Arbery got away with because of "mental and emotional" (anger) issues.
McMichael knew Arbery had a previous gun charge.
Arbery knew McMichael knew and probably recognized him.
The laws were well presented as was McMichaels law enforcement background.
ARBERY ran towards the truck & the person with the shotgun...