The shooter appears to be wearing one of these shirts. I’m not sure what significance, if any, there might be.
https://www.bunkerbranding.com/products/military-green-demolitia-t-shirt?variant=8137045639213
Interesting - thanks for the link
https://www.bunkerbranding.com/products/military-green-demolitia-t-shirt?variant=8137045639213