It is an upsetting loss when such a gamble misses. And if it had succeeded, there would have been huzzahs, probably even from you, I expect, Jim. The operation apparently involved grueling hours of teasing apart mutual brain tissue -- this was not an ordinary SIamese twin deal. It sounds like the surgeons who made the effort were quite heroic about it.
Anyway, this is an over, done with, gone story now.
They're dead, Jim.
And they were not murdered.
And I wish they had made it but they did not. Move on.