People use their own land, imo, as they have complete access...and can be there anytime without anyone thinking it unusual. Still...I feel doubtful this is the case here.
But, that said...there was a hideous case, in the 80’s I think...wish I could recall her name, Karen maybe, in the mid-west, maybe Indiana. She was going out of state for a modeling job, so her ex had their baby. Only she didn’t make it out of state...ex and his parents killed her, disposed of her body in some horrible way on their farm. LE later found a button unique to her clothes on their land, which lead them to either body parts or further evidence. All three were charged. All about custody. The case was on one of those older true crime shows, maybe American Justice or Forensic Files.