The active-duty US Army Green Beret who authorities say exploded a Tesla Cybertruck outside the Trump International Hotel in Las Vegas this week struggled with injuries relating to his military service and said he was depressed while they were together a few years ago,

Matthew Livelsberger, a highly decorated Special Forces soldier, is believed to have rented the Tesla truck, driving it to the entrance of the hotel and touching off an explosion. Livelsberger died of apparent self-inflicted gunshot wounds,

The highly decorated Special Forces soldier who died by suicide in a Cybertruck explosion on New Year’s Day confided to a former girlfriend who had served as an Army nurse that he faced significant pain and exhaustion that she says were key symptoms of traumatic brain injury.