Authorities have arrested two Southern California brothers on suspicion of killing a 16-year-old girl who vanished last month.

Riverside County Sheriff Chad Bianco said Tuesday that evidence dug out of the brothers’ Hesperia backyard led investigators to believe Aranda Briones was a victim of homicide.

She was last seen alive on Jan. 13 at a park in Moreno Valley, east of Los Angeles. Authorities are searching for her body.

The sheriff says Briones was a high school friend of 18-year-old Owen Shover, who was arrested Monday at his home. He could face a murder charge. His brother, 21-year-old Gary Shover, was arrested on suspicion of conspiracy to commit murder.

It’s unclear whether they have attorneys.

This Feb. 12, 2019 photo released by the Riverside County Sheriff's Office shows Owen Shover, 18, one of two brothers who have been arrested in the disappearance of Aranda Briones, 16, who has been missing since Jan. (Riverside County Sheriff's Office via AP)
This Feb. 12, 2019 photo released by the Riverside County Sheriff’s Office shows Owen Shover, 18, one of two brothers who have been arrested in the disappearance of Aranda Briones, 16, who has been missing since Jan. (Riverside County Sheriff’s Office via AP)
This Tuesday, Feb. 12, 2019 photo released by the Riverside County Sheriff's Office shows Gary Anthony Shover, 21, one of two brothers who have been arrested in the disappearance of Aranda Briones, 16, who has been missing since Jan. (Riverside County Sheriff's Office via AP)
This Tuesday, Feb. 12, 2019 photo released by the Riverside County Sheriff’s Office shows Gary Anthony Shover, 21, one of two brothers who have been arrested in the disappearance of Aranda Briones, 16, who has been missing since Jan. (Riverside County Sheriff’s Office via AP)

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