Right you are Platapus. They can determine what type of agent it was with blood and tissue samples but, it will be nearly impossible to finger the culprit who pulled the trigger without getting your hands on all of the people Assad put in charge of his chemical weapons and all of the FSA people who might of had access to chemical agents via outside sources.
It'll take a whole lot of time and waterboarding to get these suspects to confess their involvement. Even then, the information would be suspect.
I don't think the intelligence community can truthfully say they found a smoking gun.
But, like every other untenable war, this one will be started with a lie too.
