I'm confused why there is an interest in tying the pig farm lead to the timeline. In a crime TV show, every piece of information is related to solving the crime, and it's all neatly wrapped up in an hour. In real life, police track down leads, and many times the leads produce nothing. They then turn their attention to another lead, follow that route, see what turns up.
The pig farm has nothing to do with Mollie's abduction and murder. We know that police were in the area because they had a digital signal 10 miles SE of Brooklyn. What we know is that based on the digital signal, police searched several farms, including a pig farm, near Mollie's body, but they didn't find her in the 5 weeks after she disappeared.
What am I missing? What is the significance of the pig farmer now that the suspect is identified?