A Murrieta woman alarmed that her 63-year-old mother had displayed a loaded gun to her adult son during an argument called police Sunday but the woman was not arrested.
Instead, the woman, whose name is not public record at this time -- was taken to a county mental health facility for an evaluation, Murrieta police Sgt. Jay Froboese said.
The incident was reported to police at 4:46 p.m., police said.
"She just arrived from Arizona," Froboese told Patch.
The woman is essentially homeless and brought her luggage in her car to her daughter's home in the 29000 block of Lyra Court.
The young man -- an adult in his 20s, the sergeant said -- argued with his grandmother and she took a loaded .22-caliber derringer out of her suitcase.
The grandson told officers he was not frightened when his grandma took out a gun.
"He walked up to her and took the gun from her," Froboese told Patch.
The pistol was put away but officers took custody of it when they arrived, the sergeant said.
Her luggage was locked in her car but she might not return to live at the house when she is discharged from the county facility, the sergeant said, adding that the woman has other relatives with whom she might stay.