Driverless Vehicle Outsmarts Teen Riders

Two 15-year-olds ended a ride in police custody after a driverless Waymo vehicle flagged their behavior and called authorities.

Quick Take

San Mateo police said Waymo reported teens drinking and firing gel ball blasters from the car.
Police said Waymo stopped the vehicle, used a ruse about car trouble, and led officers to it.
Officers found alcohol and a toy gun that appeared painted black, then released the teens to parents.
The case remains under review, and prosecutors are still deciding whether charges will be filed.

How the Ride Ended

San Mateo police said two 15-year-old boys were detained after Waymo reported that passengers in one of its driverless cars were drinking and shooting gel-based pellets from inside the vehicle. Police said the company called around 2:10 p.m. and described the riders as intoxicated while they were still in the car.

Police said Waymo stopped the vehicle near 20th Avenue and El Camino Real, then used a ruse to tell the passengers the car had mechanical trouble. Officers later carried out what they described as a high-risk traffic stop. They found alcohol and a toy gun that appeared to have been painted over.

What Police Say Happened Next

San Mateo police said the object was an Orbeez-style toy gun, also described as a gel ball blaster. Officers said the teens cooperated, no one was injured, and the boys were released to their parents. The San Mateo County District Attorney’s Office is now deciding whether to file charges, including possible underage drinking violations.

The incident also shows how far autonomous vehicle systems can go when safety rules are broken. Waymo’s reported response was not passive. It monitored the ride, contacted police, disabled the vehicle, and helped bring officers to the stopped car.

Why the Story Matters

Supporters of the company may see the episode as proof that driverless cars can stop bad decisions before they turn into worse ones. Police publicly praised Waymo’s choice to call for help and said using a driverless vehicle likely avoided a more dangerous outcome than impaired driving. That view fits a broader argument that automation can make roads safer.

San Mateo teens caught drinking and shooting from a Waymo after the car itself called police!!

Two 15-year-olds were detained in San Mateo after a Waymo reported suspicious activity inside the vehicle.

Police say the teens were drinking and shooting projectiles from the… pic.twitter.com/1ktmUowmua

— Blue Lives Matter (@bluelivesmtr) July 9, 2026

But the case also raises a harder question about privacy and surveillance. The ride appears to have been watched from inside the vehicle, then reported to police in real time. For many readers, that will sound like a safety feature. For others, it will sound like a private company acting as watcher, judge, and dispatcher at once. The company has not publicly explained its side in the available reports.

A Wider Debate Around Teen Riders

Waymo’s rules bar unaccompanied riders under 18 in California, which means the teens were already violating company policy by being in the car alone. That detail matters because it shows the company had both a safety rule and a reason to act. Still, the episode may fuel debate over whether autonomous vehicles should monitor minors this closely, especially when low-level misconduct becomes a police matter instead of a family matter.

For now, the facts are narrow but striking. Two teenagers were riding in a self-driving car, drinking, and using a toy gun. The company called police, the car was stopped, and the teens were detained without arrest. In a country already split over public safety, surveillance, and trust in institutions, the story fits a larger pattern: people want new technology to solve old problems, but they do not always agree on the cost.