And you know any of that how?
What do I know for sure? What do WE!!! know for sure. Let's look.
We have a dead, unarmed, black person, Arbery, who was shot by one of the armed white persons, the McMichaels.
We have a person who filmed the event, Bryan.
From statements allegedly taken from the two white persons, they were attempting to make a citizens arrest.
Things went awry. The person they stopped tried to grab one of the white person's guns and was shot and killed. Some of the event was caught on video by Bryan.
The white persons had no authority to stop Arbery. They were not leos, and they had not witnessed Arbery committing a crime.
How's that for what we know?