Evidence recovered, if it was, that is related to the murders of Abby and Libby is the real issue at hand. That's why those FBI, ISP, and other LE were there because they've said so. They had probable cause to search RL's property based, according to LE, on information, tips, or evidence, paraphrase, that they'd developed since the murders. There is a reason they seized the vehicle. Although we do not know what else they seized, at least one reporter reported they left with "armloads". They were there at least 10 or more hours conducting that search. There is a good reason for it, IMO, because they have a double homicide to solve and I doubt they'd waste time making a show for the media.