A Fringe Question

[kitmerlot_1213]

I am confused about a plot point from last night's episode:

Was the guy who owned the abandoned dairy farm the killer of both girls?  Or are we supposed to think that Newton did the killings to find Peter and the dairy guy was a convenient scapegoat?  But then again, the cop was found alive at the dairy farm as well--did the guy kidnap him?

I think I was so confused and could barely concentrate on the crime because I was so concerned about Walter's welfare.  And I love how Astrid and Olivia just stepped right in to help to take care of him.  They really are a family :):)