Investigation
Usually, forensic experts require at least a week to conclusively decide what bodies have been found and when or when they originated from. They had kept John from making the call and what they had discovered showed that there would be no reason for further inquiry in this circumstance. They already had all that they needed.
False Alarm
They saw a life-size human skeleton, but it was a fake one, too. As a Halloween scare or prank, someone could have placed it inside the tree bark and forgot about it. They’re laughing in relief, but what they can’t comprehend is why Kyle would warn them of a scenario like this.