Use a long white nightgown to emphasis the innocence of the character and also it is a common convention in horror movies as it is creepy.
This vest would go well with the costume of the old man, he will also wear a ruffled under shirt to compliment it.
We will use this axe hammer as the murder weapon and to show this we will have snippets of this and a sledge hammer throughout the trailer, although it is a common weapon we think it is the most effective.
