So why was he going to WHF?
My view is he would have checked it.
He could have asked someone from EP to show him. But not hard to work it out himself.
Seems he bought up the fact he entered WHF in Sept for his keys, the first time he mentioned this was at Trial? Coincidence or what?
268. The examination of the Farm for entry and exit marks became particularly significant. On the 1 October 1985 Brian Elliott a forensic scientist examined the window catch and surrounding area of the downstairs bathroom/toilet sash window. He noticed that the brass catch had been scratched on the inner edge and that there was damage to the white paintwork on the adjacent faces of the top of the bottom sash and the bottom of the top sash. The white paint on the outside of the window including the outer face of the top of the bottom sash appeared clean and fresh.
269. He concluded that the damage to the sash window and catch was consistent with a thin blade having been inserted between the closely fitting sashes of the window in an effort to force the catch open. Furthermore this attack occurred after the outside of the window had last been painted. There was evidence that the windows had been painted in June and July.
270. It was the prosecution case that the marks on the paintwork had been made by the appellant when entering the Farm during the late evening or early hours of the 6 or 7 August in order to commit the murders.
271. It was the defence case, revealed for the FIRST TIME AT TRIAL, that the appellant made those marks following his release after Police interview on or about 16 September upon his return from London having forgotten his keys. It was of potential advantage to the defence to demonstrate that the window in question was examined on the 8, 9, or 10 September and that at that time no marks were found on the window.