Answer: 

Mark Crimson: “?” = question MARK, so the note on the door reads “Question Mark Crimson. He broke your window.”

Winners:

First:

Fawzy AbdAllah

Second:

Hanaa

Third:

Sherif Diab

Then:

Amir Alaa

Mostafa Mahmoud

Rokaya Mohamad

Congratulations to all winners

Reference.