Notice Westerfield underscores it by the italicized portion:
WESTERFIELD: No, it was spur of the moment. Because I had a, you know, I had made a commitment to Gary to be at the bar on Friday night. And I knew that I had nothing really planned for today. So it was going to be Saturday, Sunday, and Monday.
end excerpt
Plus Neal said their weekend camping trips were usually Fri thru Sunday.
Nobody is saying the statement and the statement alone are proof of murder, but it is foolish to just cast it aside without giving it some thought.
I agree. Did the person say that they were giving it thought? No. The person said DW LIED.