A quiet Martinez street turned into a murder scene after surveillance video captured a fatal stabbing in a front yard and police arrested a local man the next night.
Quick Take
- Police said 68-year-old Todd Stewart was stabbed outside his home on Francis Court just after 5 p.m. Thursday.
- Investigators said surveillance video showed the attack and the suspect leaving in a gray Cadillac sport utility vehicle.
- Martinez police arrested 36-year-old Marcos Iriarte-Valdez at his home Friday evening on suspicion of murder.
- Reports said Iriarte-Valdez had been released from jail one day before the killing while awaiting trial in another case.
What Police Say Happened
Martinez police said they received multiple emergency calls around 5:09 p.m. Thursday about a stabbing on Francis Court. Officers found Stewart, 68, outside his home and said he died at the scene. Local reporting described the attack as happening in a normal neighborhood where residents suddenly heard screams and saw a violent assault unfold in broad daylight.
Police also said a neighbor’s surveillance camera captured the stabbing and the suspect’s escape. Reporting described the footage as showing Stewart fighting for his life while the attacker, wearing dark clothing and a vest, stabbed him several times before driving away in a gray Cadillac sport utility vehicle. That video became the key lead that helped investigators move from a chaotic scene to a named suspect.
How Investigators Closed In
By Friday night, police said they had arrested Marcos Iriarte-Valdez, 36, at his home in Martinez. Sources said officers used the vehicle trail, community tips, and surveillance work to locate the Cadillac and then watch the suspect’s home before moving in. A California case like this can move fast when video, car sightings, and local police work line up within hours.
One detail that is drawing attention is the suspect’s recent court history. Reports said Iriarte-Valdez had been released from jail on his own recognizance one day earlier while awaiting trial in a separate burglary case. That timing will likely fuel debate about bail, pretrial release, and public safety, even though those issues are separate from the question of who carried out this killing.
Why This Case Is Getting So Much Attention
The homicide is shaking people because it happened in a front yard, in daylight, on a street that was described as quiet. It also fits a larger pattern in which police and the public are now depending on cameras to solve violent crimes quickly. The upside is speed. The risk is that a short video clip can shape public judgment long before any court record, forensic report, or trial testimony is available.
Martinez police arrested a 36-year-old man on Friday on suspicion of stabbing another man to death on Thursday, according to a department press release. https://t.co/Juja91t4Uc
— Oakland Tribune (@OakTribNews) August 8, 2026
At the same time, the public record now is still mostly built from police statements and news reports based on those statements. That is enough to report the arrest and the basic sequence with confidence. It is not enough to settle motive, confirm every detail of the video, or answer broader questions about what police knew before the attack or how the suspect was free in the first place.
Sources:
nypost.com, yahoo.com, facebook.com, youtube.com, instagram.com
