A fairly large number of them were marched upon a big bridge and their heads were cut off. Turkish Haircut
I would not be surprised if our last CIA director the Muslim Convert Brennan actually gave Erdogan a report from our master database of those officers he should target. Then they convinced someone stupid to try to coup, and then proceeded to squash it early so it failed. Just saying, professional courtesty, 1 Islamist to another Islamist.
That is all certainly plausible.