Another early rumor later abandoned.
If he had one on, he could have removed it.
Then again he could have had on a mask with an angry Jason face on it, and that is what she is referring to as him looking "angry".
But I don't see a mask listed as stuff he entered the school with on wikipedia or anywhere else.
So pick your poison. The girl could be right on no matter which way you want to go.
>>But I don’t see a mask listed as stuff he entered the school with on wikipedia or anywhere else.<<
It’s not hard to use google to find news reports of the killer wearing a mask.