I take it you have read this site :-
http://www.gravelroots.net/petworth/12.html as Chris says the red swastika is suspect. The history of KG6 'Wir flogen gen Weten ' states a few Ju88's of I/KG6 took off from Creil at 1030 hrs on a nuisance raid to towns on the English South Coast. It shows that 3E+DH flown by an Oblt. Faulhaber landed at Creil at 1220 hrs, if the school was attacked in that time scale KG6 with its Ju88's would be a strong suspect.