I agree with you here. I do find the response time a little odd and heard this on the radio today that it was six minutes before the mass shooting took place. Like I say, this whole thing just keeps on "NOT" adding up. I think there are things they aren't going to tell the public and we may never know.
Even the girl that cuts my hair, today told me she thought it sounded like two shooters and also sounded close to a belt fed weapon(keep in mind she's very pro-gun and loves to shoot). This was without me even bringing it up. Once she brought it up, we traded all kinds of theories and thoughts on what happened and even she said, there are things they aren't telling us and won't tell us.