Little Sneak!

Unusual: The pantry light was on.

Unusual:  There is a chair in the pantry.

Unusual:  The seal on a package of cookies had been broken and the flap was still up.

Putting pieces together:  It's dinner time which leads me to believe a certain hungry little someone helped himself to a cookie.  

I search and find the certain little someone [Cole] and question him about the chair and cookies.  He proudly informs me he didn't have one cookie, he had three.

  On the bright side:  Way to be proactive.