A knifeman who allegedly stabbed a 68-year-old man to death in broad daylight had been released from jail just a day earlier.

Marcos Iriarte-Valdez, 36, was originally arrested over a spate of burglaries on April 29, before he was released then rearrested for breaching his home detention last Tuesday.

During a court appearance on Wednesday a judge ordered him freed on his own recognizance and referred him back to the home detention monitoring program.

Iriarte-Valdez allegedly killed Todd Stewart outside his home in a terrifying attack caught on video in Martinez, near the Bay Area, California on Thursday.

Surveillance footage shows Iriarte-Valdez pulling up in a Cadillac SUV wearing dark jeans, a gray shirt and a tactical vest.

He stayed inside the vehicle for a brief period before exiting and allegedly launching the brutal knife attack on Stewart.

The two men were seen struggling on the sidewalk between two parked cars before the victim was knocked to the ground.

According to police, Iriarte-Valdez continued to stab Stewart repeatedly as he lay on the pavement screaming for help.

Iriarte-Valdez was arrested again on Friday after being found at his home, with bail set at a $1.1 million as detectives investigate the killing.

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

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

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

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

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