I don't know why I can't see the reply you gave for the "immediate knowledge" part down below, so I'll reply here since it's still relevant - English (the property owner) hadn't even seen the footage of the trespass until after the shooting, nor did he see the text message.

https://www.wtoc.com/2020/05/11/homeowners-attorney-arbery-familys-attorney-respond-new-video/

Mr. English wants to correct the mistaken impression that he had shared this video or any other information with the McMichaels prior to the McMichaels’ decision to chase Mr. Arbery. The homeowners had not even seen the February 23 video before Travis McMichael shot Mr. Arbery. When homeowner Larry English saw the photos of Mr. Arbery that were later broadcast, his first impression was that Mr. Arbery was not the man captured on video inside the house on February 23, and he said that to a neighbor.