Hi, that is a Carbon Motors E7....
Carbon Motors makes a logical point with their new Carbon E7 purpose-built police car: while other government services like fire trucks are purpose-built, police vehicles are usually stock civilian vehicles which are then modified to suit police purposes, with stuff like radios, sirens and other equipment added aftermarket-style.
The Carbon E7 is the world’s first purpose-built law enforcement vehicle. The result is a police sedan that runs on a 3.0 liter inline-6 twin-turbodiesel engine that is bio-diesel capable, putting out 300 horsepower and 570Nm of torque via a 6-speed automatic transmission through the rear wheels. That actually pretty much sounds similar to the BMW 335d or the 535d. While the engine is from an unnamed third party vendor, the aluminium spaceframe chassis has been entirely developed in-house. The car is designed to have a 400,000km lifespan.