At the fruit stand, the owner tells them that Franzen was his best customer, coming by every night before closing on his way up the hill, coming back down very early in the morning. Shawn and Gus continue up the road in the direction Franzen went and discover a gate someone has been sneaking through. When they get to the other side, they find a large field in which many holes have been dug and filled in, but before they can investigate further, gunshots ring out, forcing them to run for their lives.
Shawn and Gus go to the police station to tell Vick about the farm when Lassiter and Juliet show up to announce they've found the truck and a bunch of damning evidence against Ethan. Shawn insists the answer still lies at Deacon Walker Farm. The cops tell him Franzen made several offers to Farmer Walker to buy his land and was politely refused. The farmer was very forthcoming with the police and his story checked out. Unconvinced, Shawn and Gus go back to the farm with digging equipment. Franzen was looking for something. The holes were dug methodically in the exact pattern of the tic-tac-toe board Shawn found earlier. He realizes that the grid marked where Franzen had found what he was looking for, which turns out to be the only hole to be refilled by a bulldozer, the one piece of equipment a paleontologist would never use. They proceed to re-dig the hole where they discover a perfectly preserved skull of a T-Rex.
Franzen knew he'd find the dinosaur somewhere on the land, but Farmer Walker refused to sell it or let him dig there, for some reason turning down a potential windfall. When they go to ask him about it, Shawn also sees more refilled holes around the house, all of which were dug by a bulldozer. Which means, the farmer was digging as well. Just then Henry calls to warn him to stay away from the farm. He had a case out there years ago when Deacon, the farmer's partner, went missing. He suspected Walker but the case went cold. Shawn tells him he's already at the farm and he's just solved the case. He calls the police out to the farm where he tells them that Walker killed his partner and buried him someone on the farm, but he forgot exactly where. That's why he couldn't let Franzen dig on his property and why, after he discovered him there one night, he had to kill him and dump the body elsewhere, recovering the dinosaur bones so no one else would come out with the same idea.