A search of various fields last week turned up no sign of a 5-year-old Idaho boy who vanished in late July, according to police.

The Fruitland Police Department said on Friday in a statement that there was “no trace” of Michael Vaughan at local fields and cornfields which were recently cleared and harvested. Police said Vaughan’s family is cooperating with the ongoing investigation.

WITI reported that Vaughan vanished from his home in Fruitland on July 27. He was last seen wearing a light blue Minecraft shirt, black boxer briefs, and flip-flop sandals.

Fruitland police said they also plan to search some irrigation drainages within the next week or two. A $26,000 reward is being offered for information that results in Vaughan’s safe return.

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[Featured image: Michael Vaughan/Fruitland Police Department]