One is Too Many

I offer the following evidence in The Case of the Missing Puzzle Pieces:

Exhibit A:
When asked what the suspect was doing, he answered "Ahh-Ohh!"

A witness was called to the stand:

His testimony follows:

"I was riding my tractor and I bonked my self really hard!"

Apparently he then saw this:





So, ladies and gentlemen of the jury - what is the verdict?