Francisco Serna was shot dead by Bakersfield police after a call about a man armed with a gun. No gun was found.
A California grandfather suffering from dementia was shot dead by police this week.
An officer fatally shot Francisco Serna, 73, while responding to a call about an armed man in Southwest Bakersfield Monday.
Read: Prosecutor Announces Cop Who Shot Keith Lamont Scott Won't Be Charged
According to reports, police had arrived to Serna's neighborhood after midnight, where they found the father of five standing in a neighbor's driveway.
When a witness pointed to Serna, the Bakersfield Police Department said an officer shot an unknown number of rounds, striking Serna, who was declared dead at the scene at 1:15 a.m.
Officers searched the scene but no weapon was found.
Serna's son told the Los Angeles Times that his father was a retiree with no intention to hurt anyone.
"My dad did not own a gun. He was a 73-year-old retired grandpa, just living life," Rogelio Serna said. "He should have been surrounded by family at old age, not surrounded by bullets."
According to the son, Francisco Serna was in the initial stages of dementia and had been suffering from delusions in recent weeks. It was unclear why he was in the driveway.
Watch: High School Officer Who Allegedly Punched Student On Leave Pending Investigation
Coroners said they will perform an autopsy.
The officer who fired the shots, whose name has not been made public, is on administrative leave.