February 3, 2026 - Mariposa County Sheriff's Office officials report a juvenile is missing in Mariposa County. 

13-Year-Old, Briella “Luna” Guerriera left her residence in the Lush Meadows area in Mariposa County between 9:30 P.M. on Sunday and 6:15 A.M. on Monday.

Briella Guerriera was last seen at her residence in Lush Meadows in Mariposa County, on Sunday. She left on foot, headed to an unknown location and was last seen wearing pajamas and maybe carrying a black backpack. 

Briella Guerriera goes by the name Luna.

Please Contact the Mariposa County Sheriff’s Office If You Have Any Information Regarding Briella Guerriera

Briella “Luna” Guerriera

Missing From: Mariposa, CA.

Date Missing: 02/02/2026

Age: 13

Sex: Female

Height: 5’03”

Weight: 96

Build: Thin

Eye Color: Blue

Hair Color: Brown

Race: Caucasian

Source: Mariposa County Sheriff's Office