Why is Freddy face burnd?

Freddy Kreuger was a psycopath killer even before he went to hell. After killing many kids, the parent really got mad. They tracked him down with weapons and fire. He ran and locked him self in a run down boiler room. One male parent tried to unlock the door but couldnt. So he lit a bottle of Gasoline and threw it in the window, Freddy ripped off his jacket into his well known green and red shirt just before he was sent spiraling into the firey depths of hell.