I thought the cause was because of the dog. If there's no dog, that particular police cruiser would be spared for that particular timeline
That's because Tesla and other car manufacturers are still using the proven unreliable radar system for stopping for a stationary obstacle, especially at a high speed.
The radar system has been invented before World War II and no one has been able to perfect this inability to distinguish which is a harmless object and which is a very dangerous stationary obstacle for the past century.
Year after year, people keep thinking that the radar would be able to do that very "soon".
Luckily, Tesla has found an alternative with its cameras. It's just a matter of time to train software to use the cameras for the reliability of avoiding crashing into stationary obstacles.
Hopefully, that "time" is not just like the century old radar "time" too!