Who stole the donuts???

Year 7 became forensic scientists today, as they used chromatography to try and discover which member of staff stole the donuts from the staff room (it wasn't me, promise!). They had a note from the dastardly culprit that said 'Ha, ha, you won't catch me!' and they had to compare the pen ink with the pens of the likely suspects. Obviously, none of us would really steal donuts but it did make the students laugh! 

It's World Water Day but the best connection I could muster up was that the solvent we used was distilled water.