This is a Homeland Security cruiser. I did not take a photo of it. It is freely available on the internet, courtesy of Flickr, or everywhere else, really.
This was the exact type of vehicle they were so concerned I would take a photo of. The fact that photos of these cruisers are so readily available makes it even more bizarre they were concerned about my taking a photo of one.
Again, I did not take a photo of it, nor did I ever intend to take a photo of it. I was not particularly interested in anything else that day other than taking care of my 3 children and dog.
I have a clear memory of what this type of cruiser looks like, since it was chasing us down with flashing lights and sirens.