Russia will undoubtedly conduct its own internal audit for the origin of the chemical weapon used in this attack. Here is how I think it will go:
Putin: (to manufacturer) “Did you make this poison?”
Manufacturer: “No.”
Putin: (to spy agency) “Did you order this poison to be used?”
Spy agency: “No.”
Putin: “See? Proof.”
The nerve gas attack was done because Putin wanted someone to know that he did it (Unless of course, he has less control than it’s believed). If it was just a matter of having the guy dead, they could have done it with rat poison from the hardware store.
I bet he wanted Manafort and Flynn to know what happens to guys that rat.
Your suggested investigation seems thorough enough:
Once the questions have been rephrased and repeated, it will rise to the level of Drumpf’s interrogation of Putin which was far more rigorous than W’s query of Vlad’s soul. After all, if it’s good enough for the US executive branch, it has to be sufficient for the international community.
Kinda like the evidence for WMD in Iraq, but without having Joe Wilson muddying the waters.
More like:
Putin: (to Spy Agency) “Did you make this poison?”
Spy Agency: “No.”
Putin: (to Manufacturer) “Did you order this poison to be used?”
Manufacturer: “No.”
Putin: “See? Proof.”