On entering the property at 9.58 pm officers found Mr. Gilmer with serious injuries to his right arm and a crossbow wound to his torso.
His pregnant girlfriend Laura Sugden was found at a nearby neighbours house with injuries to her head and neck.
The Police released a statement on Friday evening which stated a crossbow had been found at the property of Mr. Gilmer and Ms. Sugden.
Humberside Police issued an arrest warrant for Anthony Lawrence who was also known as Tony Howarth, this named individual lived next door to Mr. Gilmer and Ms. Sugden.
Humberside Police on Monday 15 January 2018 stated they had found a body during the hunt for Anthony Lawrence.