UPDATE: Man arrested in connection with double fatal shooting in Arivaca

Authorities said Kaycie Mattias and her mother Monica Gilkey were shot to death

UPDATE: Man arrested in connection with double fatal shooting in Arivaca
(Source: PCSD)

ARIVACA, Ariz. (KOLD News 13) - A man is in custody after two women were fatally shot in Arivaca early Thursday, Oct. 15.

The Pima County Sheriff’s Department said Justin Tyler Grandstaff, 36, was arrested at the Arivaca Border Patrol Checkpoint with assistance of U.S. Border Patrol.

The PCSD said Grandstaff is accused of fatally shooting Kaycie Mattias, 33, and her 55-year-old mother Monica Gilkey. Mattias died at the scene of the shooting, the 17000 block of West Third Street, while Gilkey died at a local hospital.

Grandstaff is facing two counts of first-degree murder.

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