There is so much weirdness in that description.
"In [his] possession"... "A handgun and shell casings were located at the scene." That is not terribly specific. Was it in his hand? Was it in his tent? Was it within five feet of where he was shot? I see a picture of a dirty handgun laying on the ground with a few cigarettes and ashes. Obviously it's not in a tent. Did the cops move it to take a picture? Casings would imply multiple shots from this gun. How many shots are they claiming Teran fired?
And the chain of events is pretty murky. Cop calls out to Teran who was in his tent. Teran doesn't comply and then shoots the cop. The would imply the cop was in the tent, or at least at the entrance. Then several more cops shoot Teran. Were they just shooting blindly into a tent? Are they saying Teran came out blasting, making some bizarre you'll-never-take-me-alive coppers moment?
"Additionally, mortar style fireworks, multiple edged weapons, pellet rifles, gas masks, and a blow torch were recovered." So this was the only firearm that was found? Teran, who had been quoted days earlier about avoiding violence, was actually an outlier for being armed? Everyone else avoided having a firearm.
"Other preliminary information released in this case is consistent with the investigation so far." What about the unreleased information?