> How clear is the uncertainty of the output?

It is not even clear from the article that there were anything wrong with the output. She has a car of that make. And it doesnt appear to be in dispute that she drove nearby.

It simply is the case that “being nearby” in itself is not enough evidence that you were involved in a crash. Especially when the colour doesn’t match and the vehicle is not damaged.

The fundamental problem here is that the police are very bad about false positives. Flock gives them a ton of data--but that doesn't make it magically perfect. No surprise there was a similar car nearby--there are a lot of similar cars. Flock shows them the similar cars and they pick the closest without any investigation.