Bloody Moon (1981) on Netflix

A woman is seen rolled in a wheelchair at night. Miguel, a man with a heavily scarred face, hands around a dance outside. As a young couple enjoys some time together, Miguel steals the boy's mask and shirt and puts them on. He leads another dancing girl to believe that he is Ralph, and they go to her room, where they lie on the bed for some kissing. The girl takes away the mask, sees Miguel's face and kicks him away. Miguel grabs a pair of scissors and stabs the girl repeatedly in the stomach.