The pig farm is 15 miles from Brooklyn, correct? Cheney is a convicted stalker? What brought LE to the pig farm? Was it her fit bit? Her phone?
Seems he has been cooperative, he gave them his phone, let them search his property without a warrant and went in to the fire house for 2 hours of questioning.
I don't blame him for not wanting to take a polygraph. There is nothing for him to gain in it, they won't stop bugging him if he passes or fails. He is like the farmer in Abby and Libby's murders, his house is close to where they think some evidence may be.