I honestly don't see how his face was in that condition even if he had suffocated. Then there are questions about what was he doing there at that time and how did he drop his shoe anyway.
Is the coroner's report available somewhere?
According to LE, he was completely face down - in a handstand type of position - for at least 24 hours.
That would make his face swell like that.
Those were my questions - what was he doing there, and how was he retrieving a shoe in between classes from the inside of a rolled up mat?