[DoctorNelsonOnten]

It looks like the vehicles he was passing were stopped/stopping for the officer based on the brake lights of the last car in the line. With that being said, it's kind of a 50/50 fault because the officer clearly couldn't see around the semi and pulled out rather quick and the person overtaking was kind of reckless by passing a bunch of cars with their brakes on.
I don't know about you all, but if I saw a bunch of cars slowing/stopped I would assume there is a reason for it and follow suit.

50/50 ?
Copcar is fault, should of waited for his turn when he had clear vision of road behind him.

They are cops yeah, reckless turning is a shame. What if a car is between two trucks and decides to overtake first one? same accident.

--- Post Update ---

Dacia.

That car I mean. So my guess would be some very poor country. Could be the home country of Dacia, Romania....(Or is it Romany in english...)

DACIA is sub from Renault. Cheap yes, but we also see their SUV wannabe's driving here.