1. I believe that the day of resting is exactly what they say it is. A day for civilian searchers to rest, and a day for LE to regroup. The timing to me, being just over a week into the search is normal for this type of break. They would not be asking for searchers by the thousand for this weekend if they were calling it off soon. They may have a few areas that they want to search without the risk of the duct tape incident (plastered on all the news sites within minutes due to a loose lipped searcher and the presence of a news camera), but I do think that is all. Nothing more secretive than that.
2. It doesn't matter how big the guy was, it is still possible that it's his blood. If he had a piercing and she ripped it out, that would generate enough blood to drip. If he had an open bladed knife and she fought back, he could have cut himself. In stabbings, it's common to find the perp with a damaged hand, as hands slide down onto blades. Heck, she could even have clocked him in the head, since head wounds bleed like a mother even when they aren't serious.
Until told otherwise, I will hold out hope that it is the perp's blood.