YAKIMA, WA (KIMA) - An unexpected surprise in their son's backpack caught some Yakima Washington parents off guard. It was human waste, with a note attached from the boy's teacher. And the school isn't denying that's what happened.

"I'm still kinda in shock over this, because why would somebody do this? It's disgusting," said Jason, the father of the little boy.

It all started on Friday at Apple Valley Elementary, when kindergarten teacher, Mrs. Graham called Jason and told him her classroom was "stinky" and asked if it could possibly be his son.

Jason's son had a couple of accidents in the past. So when the teacher called, he says he told her right away, there was an extra set of clothes in his son's bag. But when the 5-year-old came home, the boy was still wearing his original outfit, and Jason says his son was completely clean.

It wasn't until Jason's wife emptied her son's backpack that they got a big surprise.

"She found a clear plastic baggie with a piece of fecal matter wrapped up in some a brown paper towel with the note on it. ‘This little turd was on the floor in my room’ And that's all it says. Q: Nothing else? A: Nothing else. If it was his did she see him do this? Or did she follow him around to make sure this was his, did she see it drop out? Or just assume it was his because he had an accident a few months ago?"

These are all answers the family doesn't have.

Jason did not receive a call from the school or the teacher.

The superintendent sent an email to say they were looking into it.

But with just a couple months left in this school year, Jason isn't sure he wants his son to stay in her class.

"Not only did she put our kid at risk, it's a health risk, other kids too, you know, on the bus," said Jason.

The West Valley Superintendent says the district's Human Resources Department was speaking with the teacher, Mrs. Graham, and the Apple Valley principal.

That meeting happened Tuesday afternoon, but at this time the principal says they are still looking into the details of what happened, and will talk with the parents further.

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Information from Melissa Wagner, KIMA