maybe he knows someone with a small plane
I don’t think this guy is a very sophisticated criminal. For goodness sake, he burned and buried Maria’s body in his own back yard. It would have been a lot smarter to transport her body elsewhere, dig a grave, etc. And then he actually tells them the body is buried in the back yard. He must have thought they’d buy his story of suicide and wanted to appear upfront. Sheesh.
The main reason he hasn’t been nabbed is this has been a very sloppy investigation. Now that the FBI is involved, it just got a lot neater. But, they are coming from behind at this point.