The Fresno County Sheriff's Office shared this photo on its Facebook page, showing Sheriff John Zanoni with 9-year-old Tristen Graham.
In 2019, at just four-years-old, Tristen was diagnosed with acute lymphoblastic leukemia.
He went into remission in December of 2021 but in April of last year, his cancer returned.
A GoFundMe page has been set up to help his family with medical and travel expenses.