Tesla truck driver at Trump hotel suffered shot to the head before explosion. Doesn't make sense

Now they are saying that the man who blew up a Tesla cybertruck in front of a Trump hotel in Las Vegas had a gunshot wound to the head, and that there was a handgun laying at his feet before the Tesla truck exploded.

So a few obvious questions here, why did the man shoot himself before the explosion if he'd likely face instantaneous death anyways? How did he detonate the explosion and make sure that it detonated properly when he was already dead? Why did none of the bystanders hear the supposed self inflicted gunshot and thus react to it? Certainly several people would have heard the gun shot. I don't even remember hearing this being part of the official story (that bystanders heard a gunshot before explosion. And why do we not see these types of events in the released video?

It seems like they killed a guy, threw him in a cybertruck, threw a pistol on the floor, had the truck drive itself there, and then detonated using timer or remotely. Either way, this story reeks of conspiracy

Source: https://www.newsweek.com/cybertruck-driver-had-gunshot-wound-head-before-explosion-sheriff-2008914