Right, because the call was for the rifle, and he didn't have a rifle on him, and there is absolutely, positively no other kind of weapon he could have had on him. It would have been impossible for him to conceal another weapon on his person.
I can't believe I hadn't thought of that.
Daniel Shaver broke no laws and his reward was getting shot to death, crying and begging on his knees, in a hotel hallway. His parents' last memory of him will be seeing him executed on video.
Here's an idea, tactical savant: if they thought he might have another gun on him, why are they having him face them and close with them when they could have easily told him to lift up his shirt and rotate to check his waistband? Why didn't they have him walk backwards toward them? Why didn't they prone him out? You can't draw and shoot very quickly at all from the prone. There are probably a dozen things or more they could have done, all of which didn't involve Twister: Comply or Die Edition, and they chose the one with the greatest risk to them and (if you subscribe to the "I'm going home tonight" line) lowest chance of nonviolent resolution. Makes one wonder if they just wanted to kill somebody.