Potty Field

On a high school track there has been found
Some human feces on the ground
And more than once had Nature called;
A camera therefore was installed.

Was it a prank or would it show
A jogger who just had to go?
The fact that it was left to find 
Implied there was an axe to grind.

Today the perp at last was caught
And everybody was distraught.
It was no kid who had a grudge 
But the district head who they must judge.

His reasons haven't been revealed
For leaving poo out on that field,
But I would guess as of today
That he has flushed his job away.