I was referring to voice recorder. I have read threads on these type of issues and a couple that's got legal knowledge said you're right to do so. While you're at it, you might wanna get them to voice out their rank name etc., date location etc. Its just normal that if he cant find anything geniune defects in your car he'll back off due to the lack of balls on these type of cops and obvious knowledge. Show them you know a bit of two that they dont and you should be fine.
If they say you have a defect, take a photo of it if you know its not. Cops that defect you at the spit down at gold coast will take photo so to proof they're right.