There is a one armed man joke here somewhere...
Neah Bay is about as far from Maine as one can get and still be in the contigous US.
Wild, beautiful, but impoverished area.
So the “DNA” says a man who rented a room(and probably had kitchen privileges in that house )had his blood on a kitchen knife? My guess is that the odds on that happening are a whole lot less than 1 in 339 million.
DNA doesn’t lie but it also is never proof in and of itself.