Yeah. The article says this training was a "bicycle training exercise". I'm not sure exactly what that entails, but unless it's confined to a small area, it seems pretty plausible that it wouldn't be feasible to have camera coverage of the entire training space (say, if it occurred out in the world).
Still, I don't know the facts, and if this "bicycle training exercise" was in a small yard of the police academy, and if "often" means "nearly always", then yeah, this would be pretty damning circumstantial evidence of malice.
It looks like they changed from bicycle training to grappling. It is possible they would have had footage if it remained bicycle training. Not sure. My point is that we can't draw any conclusions yet. There could be malice or not. I think we need to understand why the training changed to get a better understanding of what happened.
Still, I don't know the facts, and if this "bicycle training exercise" was in a small yard of the police academy, and if "often" means "nearly always", then yeah, this would be pretty damning circumstantial evidence of malice.