The point would be it was killed for unrelated reasons, and then is made available post-mortem for consumption somehow. And verifiably so!

As for the ethics:

Eating endangered animals is generally agreed to be a dick move.

I feel like that sums it up pretty well. I don't know OP but I'd bet money that they would agree it's to be avoided, so that's the light I answered the question in.

If this is a vegetarian thing, I did make a mention of that in my OP. Dispensing a lecture instead of answering the spirit of the question would have been unhelpful.