This is San Francisco. In this case the article does say the cops eventually showed which is very surprising for San Francisco.
The last time I was in the city and got into it with some rent a cop about where I parked, he threatened to call the cops. I told him to "go ahead, I'll be here another 20 minutes and we both know they won't show before I'm gone, if they show at all". He walked away. I left 30 minutes later.
No cops, of course.
In some other nearby cities it's a reasonable expectation that local PD will show for anything in 5-10 minutes but not SF. Just not realistic to expect a cop to show up in SF for anything minor like a psycho being egged on by a psycho crowd as he tries to break into a car to murder the passengers.
And for the record, I was waiting after hours in the back area loading/unloading zone for large trucks at SF Moma which is down a back alley side street and wasn't in the way of anything and easily could have moved out of the way if a truck did show up. Lillie rent a cop girl came out to harass me first then she sent huge rent a cop guy. Seriously, fuck off, it's SF, what are you really gunna do? That's just how it is in ugly uncivilized cities like that.
If that wasn't some tech bro robo taxi I doubt the cops would've showed up at all. Not in SF for little people.