Because the investigator's used it in the probable cause affidavit's to support search warrants. If they are obtaining search warrants under false pretences, that should be an issue. It wasn't just the futon cover, it was also about the paint tray, which seems so irrelevant, yet they used it to support their probable cause and it was false based on his report and interview with Susan Blake. IIRC even McG said that it had the tinfoil. This "tinfoil" issue came up earlier in the trial as well when Steer's testified. I had actually come across a new story that I bookmarked awhile back... unfortunately I was unable to get the video's to play in it, but I do recall this from back in 2010.... Mikey gave reporters a "tour" of the house in March 2010. Brother Offers Tour of Missing Family's Home Looks like there is a cover on the futon IMO.