Who stole the cookie?

"Who stole the cookie from the cookie jar"
"Joey!"
"Joey stole the cookie from the cookie jar"
Joey, with delight "who me?"
"yes you!" the circle of children scream
"Couldn't be!"
"Then who?"
"ummm" Joseph deliberates for a moment "Arnold did, Arnold stole the cookie from the cookie jar!"
Arnold turns red, the class waits for his sing-song denial
Instead he grabs a fistful of nearby crayons and throws them at the circle
"I WOULD NEVER DO THAT I AM A DIABETIC!"
The class sits in shocked silence as Arnold runs from the room, teacher just behind.
Joey turns to the classmate on his left
"The funny thing is, he's not a diabetic, just a thief."