Did they miss some evidence? (Spoilers)

Right before the closing statements, I suddenly realized that if the boy had done it, there would have been blood all over his turban. The lawyers kept mentioning him discarding his school uniform, but not his turban. In his closing statement, the prosecuting attorney mentioned for the first and only time in the movie that the boy discarded his turban.

Now here is my question: I am almost positive they showed the boy taking his turban off when he was getting his hair cut after he discarded his school uniform. Can anyone verify that for me?

If he indeed was wearing his turban when he got his hair cut, and the turban was not covered in blood, then he was innocent.