I believe I am allowed to collect evidence for my own defense
in case I should be falsely accused. The recording device
should be in the trunk.

Some people aim the camera out the rear window.

Some people have a ceiling mounted camera on the passenger side
(with sound) aimed at the driver side should they need to create a transcript
of conversation to be used in their own defense should they be falsely accused.

As the officer is not required to notify me that he is collecting evidence....
picture or sound, I may not be required to notify him that I'm collecting
evidence for my own defense. Do you want him illegally telling you not to
collect defense evidence?-Bob

I have seen in Tampa what appears to be a continuously running camera
in TPD cars.