Hate to say it, but the off duty officer wasnt following procedure on this one. You cant use unmarked cars in traffic enforcement in CA....and even a drunk motorist doesnt have to pull over for someone showing just a badge.
blue and red lights, it is in the vehicle code.
He does have quite a bit of explaining to do in this instance. It'll be interesting ...
yup , just follow and report , until Black&Whites arrive
... if the LEO made a cellphone call , it'll be interesting to see what HQs said