The Case of the Hidden Loot

Detectives Davis and Moreno were discussing a case while they drove to the scene of a crime.
“Well, it looks like Jimmy Brinks won’t be enjoying all of that money he stole from all of those bank robberies,” Detective Moreno said.
“Yes, I heard that he was gunned down by the police in Lindenbergh cemetery,” Davis replied. “Somehow that seems fitting. He goes to a cemetery and then he ends up as a corpse.”
“There’s still the matter of the missing money.”
“You mean, they never recovered the loot?”
“No, before Brinks got in a shoot out with the law, he managed to hide it somewhere. I guess he thought that he could get away and come back for it later. But that won’t be happening now.”
The detectives pulled into the Lindenbergh cemetery parking lot. They walked over the graves and carefully surveyed the area. They noticed that several other policemen were also patrolling the grounds.
“This seems like a lot of ground to cover,” Davis remarked. “Are they sure that Brinks hid the loot here?”
“They seem pretty certain about it,” Moreno replied. “Brinks was seen entering this area with a suitcase and a shovel. The found Brinks. They found the shovel. But they never found that suitcase with the half million in it. It’s likely that it’s out there somewhere, but no one knows where exactly to look. We can’t exactly dig up all of the graves when trying to find it. We have to have a good idea on where to look.”
The detectives passed several family plots as they walked through the cemetery. Davis noticed the names on the tombstones. There were spots for the Adams, the Cartwrights, the Foxes, the Davisons, the Wrights, the Zapruders, the Engels, the Douglasss, the Millers, the Kurtzs, the Morenos, the Steins, the Quimbies, the Logans, and others.
“Didn’t Brinks leave any kind of clue to where the money was?” Davis asked. “Once he got shot, he might have known that he was dying and that he would never be able to come back to collect the loot.”
“Well, he did offer a few last words,” Moreno replied. “When an officer asked him where the money was, Brinks said “It’s with the trees,” and then he died. That clue hasn’t been much help so far. There must be hundreds of trees in this area and we’ve had dogs sniffing over every one without finding so much as a wooden nickel. Perhaps Brinks was just giving a false lead. Or perhaps he was trying to make himself into some kind of legend as a crook who kept the cops from getting his loot. Maybe his last words were some kind of clue for his friends so that they could come back here and find the loot, but who knows? I doubt that anyone could find it unless they knew exactly where to look.”
“You’re right!” Davis replied. “And I think that I have an idea.”

WHAT DID DAVIS THINK?

THE ANSWER
Davis believed that Brinks might have a difficult time finding the loot if he buried it next to a tree. Since trees are routinely cut down, the money might be discovered by someone else before he could get back to it. Davis then thought that Brinks might have buried it near a tombstone, since graves are rarely moved and the money would likely be there years later. But which grave? Nobody in the cemetery was named Tree, but Davis knew that “Douglas” was a type of fir tree. Sure enough, the detectives found a recently filled grave in the Douglas section. After getting permission to dig, the found the stolen money.