You can't round up foreign diplomats and staff willy nilly. That's a big step in escalation and it's probably not good for the US to be the one making that step, especially when China already has enough negatives weighed against it.
Also, I'm doubtful that the US doesn't already have an idea of what's going on in there. So a lack of physical evidence disposed of isn't going to be a setback.
Anybody wondering why now why now too late
You can't round up foreign diplomats and staff willy nilly. That's a big step in escalation and it's probably not good for the US to be the one making that step, especially when China already has enough negatives weighed against it.
Also, I'm doubtful that the US doesn't already have an idea of what's going on in there. So a lack of physical evidence disposed of isn't going to be a setback.
I think you're right, the US has their spies too
The ones China didn't kill because of her email hacks revealing them...
I would imagine they were well into an investigation before announcing to the Chi's that they would force the embassy closed.
What is your source for diplomats and staff being rounded up?