Who is Walter Kennedy from The House Next Door and what is their importance?

Walter Kennedy is Colquitt's husband. He lives next door to the haunted house. Influenced by his wife, Walter gives himself over to Colquitt's beliefs and begins to support her ideas about evil in the house. After which, he basically gives up living He then agrees to help his wife burn down the house and murders Kim when they decide that the evil in the house came from Kim first.