OH Lord No. I just remember my science class we had beakers and little Coleman stove things and we were suppose to do some sort of chemistry experiment.
I literally broke the beaker, my girlfriend started to laugh so hard that I started to laugh until the teacher kicked us out of class. We loved it. Today, you don't get kicked out you get sent to some adult in an office who calls your parents.
That is my chemistry knowledge or lack thereof.
Sorry to be totally off topic but in no way did I want to give the impression I was a brainiac. LOL
Back On Topic
So, after all this information we do not really have a smoking gun do we.
It is the amount of evidence, of coincidences, the things, the total sum of all this that, in my opinion, points to Casey as the culprit.