IF it was staged, it won’t have been directly staged, Erdogan wil have prodded the right people and planted false intelligence with the right people to convince them to try it.
I think they were Gullens supporters, we know that Islamism gives people the justification to kill easily, I suspect Erdogan knew they were upto something and prodded them into it. That or Erdogan and Gullen are working together again.
Why is it stranger to kill to depose someone, than to consolidate power?