In the early morning hours of October 15, 2020, a shooting on the 17000 block of West 3rd Street in Arivaca, Arizona, left two women dead. Deputies arrived about 1 a.m.; 33-year-old Kaycie Mattias was deceased at the scene and her 55-year-old mother, Monica Gilkey, was found with life-threatening injuries. Gilkey was taken to a nearby hospital and later died of her wounds.

Witnesses told investigators the shooter fled immediately. Police identified 36-year-old Justin Tyler Grandstaff as a suspect; he was located and arrested at the Arivaca Checkpoint with help from U.S. Border Patrol and booked into the Pima County Adult Detention Center. He was charged with two counts of first-degree murder. The motive was not released.

If anyone knew Monica, Kaycie, or saw activity on West 3rd Street that night, can you share what you remember?