Surley it couldnt have benn Max that pushed clare beacause when it went round showin all the suspects Max was washing blood off his hands and there was no blood untill clare hit the floor nd then tha Mqeuens came straight over so thats one suspect down

i don't think it was max either. my thinking is that earlier in the episode when he was drinking, he threw a bottle against the wall and could have cut his hand on the glass when he was cleaning it up!!

Or he could have been looking at one of toms lil paintings from skwl something like that

he could have of picked the glass up after he pushed clare, or cut it in the loft