Horrifying video shows elderly man fatally stabbed in front yard in quiet California town

By New York Post (U.S.) | Created at 2026-08-08 23:55:55 | Updated at 2026-08-09 03:47:49 4 hours ago

Police have arrested the man accused of the horrifying stabbing death of a 68-year-old California man — an attack captured in shocking newly released surveillance footage.

Marcos Iriarte-Valdez, 36, was arrested at his Martinez home Friday night in connection with the fatal stabbing of Todd Stewart, the Martinez Police Department said.

Marcos Iriarte-Valdez, 36, was taken into custody.

But Iriarte-Valdez was already out on pre-trial release for residential burglaries, according to cops.

He was arrested again Aug. 4 for allegedly violating a home-detention monitoring rule — only to be released once more the very next day.

Now, following the alleged stabbing, Iriarte-Valdez is back behind bars with bail set at a $1.1 million as detectives continue digging into the killing.

“I think people can sleep a little bit safer tonight knowing that this person is in custody,” police chief Andrew White said. “Unfortunately, too, there’s a family that no longer has a husband, a father.”

The newly released surveillance video shows Iriarte-Valdez pulling up in a Cadillac SUV wearing dark jeans, a gray shirt and a protective vest.

Surveillance video captures the fatal stabbing of a Martinez man.

He appears to sit in the vehicle for a while before getting out — and allegedly launching a vicious knife attack on Stewart.

The two can be seen tussling on a sidewalk between two parked cars before Stewart is knocked to the ground.

Iriarte-Valdez allegedly continues stabbing him even after he falls, as Stewart screams in agony.

Stewart, a husband and father of two, was pronounced dead at the scene despite medics’ desperate attempts to save him.

Cops have not said what sparked the attack or whether Iriarte-Valdez and Stewart knew each other.

Crime tape after the fatal stabbing of a Martinez man.

Stewart had lived in the neighborhood for more than 30 years and had recently completed renovations on his home, neighbors told KTVU.

“He was the most mild-mannered person and the most helpful in the court,” said a friend. “It’s still unbelievable. I look across the street, and I expect him to come out and wave.”

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