If you can find a spot that doesn’t distract, and doesn’t make you look like you might be with the perp than stay and observe. If others cops arrive then depart.
Do not intervene unless the cop is in distress, and then only if you can actually do so without causing more harm than good. Just having a gun doesn’t count. (I don’t know your capabilities so I added this) I did see where a 70 YO grandmother was credited with saving an officers life.
Thank you for at least considering helping, as society crumbles around us, more and more people only consider themselves. I sometimes wonder if this correlates or is just a indication of cowardship...
Yeah, problem with this is you drive off as other police arrive, they may think you're involved and then you'll be sitting a ways down the road held at gunpoint.