THE Green Beret soldier who killed himself as he blew up a Tesla Cyber truck in front of a Las Vegas hotel owned by Donald Trump on New Year's Day left a note calling the incident a “wake-up call,” investigators said on Friday.

Master Sergeant Matthew Livelsberger left a note saying: “Americans only pay attention to spectacles and violence. What better way to get my point across than a stunt with fireworks and explosives?

“Why did I personally do it now? I need to cleanse my mind of the brothers I’ve lost and relieve myself of the burden of the lives I took.”