I think the shooting wasn’t his main plan. He probably adulterated the sandwiches and figured he’d drop them off as a “symbol of gratitude” from the local CFA. Then flee and wait for the shoe to fall. The guard stopping bin made him fall back to plan B.
A young guy probably doesn’t know about Vietnam war symbolism. Nor would 50 rounds get him far if he fired wildly.
You may be onto something.
I hope they check those sandwiches thoroughly.