Sorry, but the landlord had no business being there until after August 23rd. Too many landlords take the ‘lord’ part too literally. I would like to see more details, but given he basically was trespassing (yes, a landlord can be doing that), it makes a self-defense case that much more difficult to win.
The tenant should not have had to be evicted. He should have left voluntarily when he could not pay the rent or otherwise did not meet the landlord’s criteria for remaining. That does not excuse shooting him, and it would not surprise me if the landlord was in the wrong also (particularly removing private property before the date on the eviction notice), but the tenant was morally very much in the wrong.