An interesting question from the OP.
As an aside: @ piratepete, I agree with your "FFS" sentiment, but it wasn't murder - that requires malice aforethought or intent to kill.
However, it could perhaps be argued that it was corporate manslaughter, or whatever the term is, because (some of) the pilots involved had obviously not been trained and/or checked thoroughly enough.
And this raises the question: are there really 'pilots' on the line out there who cannot fly without a FD or look through the FD and fly sensibly when/if required? They must wonder what all those funny gauges and scales around the PFD (such as the VS scale and compass) are for..........