Meet three-year-old Wyatt Schmalz.
He's fighting for his life at Riley Children's Hospital in Indianapolis.
Wyatt has Stage 4 Neuroblastoma. It's a tumor that originates in the nervous system.
But now he has a new weapon to help him beat the cancer.
On Wednesday, Wyatt was sworn in as a special deputy with the Huntington County, Indiana Sheriff's Department.
He's now the youngest deputy in the country.
"I just lost my wife to cancer 1 1/2 years ago. This is a real special moment to me. Real touching and real moving," said Huntington County Sheriff Terry Stoffel.
Sheriff Stoffel also brought Wyatt a uniform shift, altered specially for him, a badge and an ID.
"He's really an icon for courage and living life to its fullest," said Stoffel.
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