Crime Spree in Room 1

On Thursday morning Room 1 discovered someone had been in their classroom. 
We spent the day being CSI's and looking at evidence for clues. As a class we have a large list of suspects. 
At the end of the day we felt less angry at this persons behavior but are still wondering WHY?

The Crime Scene

Mrs Thomas' hammer

Easter egg, Madisyn's pen, rocks and a mystery hat...