It's difficult to say whether he was only half-heartedly trying to conceal the crime or if he just got overwhelmed and exhausted and didn't expect to be caught that soon. He certainly researched a LOT on how to avoid being caught, but then left some pretty enormous and glaring pieces of evidence. It's puzzling. The hard drive for example - why in the world would he hide it and not destroy it? He had to know that it would be discovered if the police searched the farm. Or was he that arrogant and thought that little of the police that he thought they'd never find it? Or was he thinking he had more time to clean up/get rid of evidence and just got too exhausted and overwhelmed and kind of gave up? It's an incredibly conflicting combination of due diligence and totally sloppy neglect. Strange.
