I can’t find the actual charges anywhere.

But, I found a similar case. A security guard failed to act during the Parkland event. A Florida court acquitted him.

I expect this Texas officer to also be acquitted. However, there’s a lot of differences between these cases. My guess that he’ll be acquitted is mostly based on my perceptions that Texas is as fucked up as Florida, the facts don’t matter, and the outcome is predetermined because such strongly favors the state.