"Join" mode

[Mr. NB]

I don't think that the points one and two would work very well. If for example suspect came flying past you just after you have joined the chase, the InSim would recognise that you were close to him at one point, which would make it very easy for him to lose you. Point two is pretty much the same.

Point three could probably work though, as if you are able to touch the suspect, you are obviously close enough at that point.

I have already seen what you have described happening, but very rarely. Then again, if you are in the chase for a few seconds only, it shouldn't be such a big deal to not receive part of the fine, even though you have actually helped with the bust.