Thanks for highlighting your evidence.
Empty shell casings, if thin walled, then they are just as easy to call them high capacity high explosive. If you chemical pumps were founf next to them then thats another matter.
Chemical warfare suits, something possessed by just about evry modern army around the globe, use of these weapons does not indicate ownership of chemical weapons.
Just as BB did, I served in my country's military and did NBC training, lots of it, so I do have some knowledge of the subject.