Cop keeps interrogating me on where I'm coming from? My pleasure.
Disclaimer: I am a woman and was polite otherwise, YMMV.
When I was younger, I would visit natural parks.
One time as I was driving home, a police officer pulled me over for alcohol testing. I politely complied yet the officer must have thought I was peddling drugs or something because he asked for a further drug test and started interrogating me.
I told him that I came from the natural park, yet he was asking me the same question on repeat.
Finally, I kept a cordial demenour, imagining myself as if I were talking to a coworker and with the appropriate delivery, I went on a long monologue on how I enjoyed visiting natural parks, which road I took there, where I stopped for petrol, how much I paid for petrol, where I parked, which track I walked on, when did I decide to turn back on the track, which birds I saw on the track, the weather at the park, and so on.
Finally, after a minute, he told me to shush and then let me go after the drug test came clear.
I think some cops would have gotten more angry by this behaviour but what worked for me was my genuine delivery. 119