I just believe that there's video of him coming and going on the company property that night. Why would he simply decide to confess unless he knew he was busted? I think he asked for the time with his family before his arrest. That's all he's got, he's going to need them and he had to tell his story. JMO
I don't think the remote Anadanko oil well he chose would have had any cameras. More like just stuck out in a field with a chain link fence around it to keep cattle and kids out. "Company property" for Anadanko in that area is about 3/4 of the entire county and mostly all unfenced, ungated, and not on surveillance.