Time to start my clue search.
Part 1: Currently known official information
These are our 11 suspects, but which one is the killer?
Each had motive
Based on unknown whereabouts at the time of death, we assume each had opportunity.
But who had the means, we don’t yet know.
Reason to believe it was homicide. So however she died, it must’ve been clear that it wasn’t an accident or natural causes.
Sometime during school hours, that’s as much as we know. 
No idea about location yet