The self-driving car, owned by San Francisco-based Cruise, was pulled over for not yielding to a pedestrian at a zebra crossing. Cruise says its data shows the person was far away enough from the vehicle and the car did nothing wrong.

A witness, Kevin O’Connor, snapped a photo after seeing the motorcycle officer pulling over the self-driving car as O’Connor drove through the South of Market area last week. “There was another car stopped alongside, and he looked a little befuddled. The cop was writing a regular ticket like they always do.”

Unlike most accidents though the defence has a pile of data and footage to show what happened.  According to data collected by Cruise, the pedestrian was 10.8 feet away from the car when, while the car was in self-driving mode, it began to continue down Harrison at 14th St. Shortly after the car accelerated, the officer pulled it over.

Cruise said: “Safety is our priority in testing our self-driving vehicles. California law requires the vehicle to yield the right of way to pedestrians, allowing them to proceed undisturbed and unhurried without fear of interference of their safe passage through an intersection. Our data indicate that’s what happened here.”

The pedestrian involved didn’t get hurt. It happened a week after an Uber car in self-driving mode hit and killed a woman crossing the street, outside a crosswalk, in Tempe, Arizona.

The company claims the human test driver did everything right but is now responsible for the citation.