Moreover, if Al Nusra was replicating the type of low-grade Sarin it employed at Ghouta in 2013 at Khan Sheikhoun, it is highly likely that some of the victims in question would exhibit Sarin-like symptoms. Blood samples taken from the victims could provide a more precise readout of the specific chemical exposure involved; such samples have allegedly been collected by Al Nusra-affiliated personnel, and turned over to international investigators (the notion that any serious investigatory body would allow Al Nusra to provide forensic evidence in support of an investigation where it is one of only two potential culprits is mindboggling, but that is precisely what has happened).