I agree. But do you think that if other people (i.e. prospective buyers) have been all over the boat it would make any kind of blood evidence too weak to stand up in court? Or even inadmissible? Or do you think that, given Sarm hasn't been seen since that night, any blood of hers would be compelling enough to at least arrest and question him? Or is it all just meaningless as she could have had a nosebleed/cut herself chopping food/whatever, at any point before she disappeared? I can't make up my mind.