The officials know that 2 guards died, right? Why is only one discussed?

Thanks.

He was the guard in the wheelchair who had the stroke. His killer, Maureen Kukudio, was confirmed to be dead at the start of Season 6 so they already know what happened with him.

The other guard, Piscatella, is the one where the cover-up blaming the inmates is going on.

Oh, yes - I guess I forgot that she died. thank you.