In the API example shooting callout, the following comment is present:

// Enable chase AI and extend sense range so suspects won't flee immediately but fight longer

The code it's referring to contains the line

criminal.RangeToDetectEnemies = 80f;

So what is this RangeToDetectEnemies, and how's it work with the pursuit system?

It scans the area for enemies within the given range and if there are no, the pursuit system will make the suspects flee. However, for a shootout, we wanted to make the suspects actually fight and only flee if no enemies are around in a big area. So setting this to a very small value, will make suspects flee sooner, while a higher value will make them stay longer until every cop around is either killed or very far away.