I wonder if LE may have had tunnel vision in the beginning of the case, believing that the perp had to be from the community. If so, they may not have felt they needed to look outside of the community and, therefore, didn’t think obtaining and reviewing surveillance on routes out of town were worthy of their available resources at the time (right or wrong, I won’t say). Then when they realized there was the real possibility that it wasn’t someone in Moscow that committed the murders, they started checking for surveillance on the edges of town. They didn’t start including their request for video surveillance in specific areas until November 19th, 6 days after the murders.