The police cruiser fleet has diversified a lot in recent years, but joining the in the Los Angeles Police Department motor pool is quite the ride: a Tesla Model S P85D. The car's been in the LAPD fleet since September 2015 (alongside the old stalwart Ford Crown Victoria and newcomers Ford Taurus and Explorer, Dodge Charger, and Chevy Caprice), being put through the paces to determine how and if electrified vehicles have a place in the police force. It's not actually out on duty, but it is being put through the paces.

LAPD's Model S P85D high pursuit cruiser is the last thing you want to see in the rearview mirror

According to CNBC, Tesla loaned them the vehicle for evaluation and has been working with the LAPD to assess performance and the unique demands of police vehicles.

LAPD Police Administrator Vartan Yegiyan, the $100,000 Model S P85D obviously isn't a practical car for a metropolitan police department, but it is a harbinger of things to come:

In the next three to five years ... not only will the industry push toward electrification, but prices will drop on vehicles. More models will be coming out, and the electricity and electrical grid will become more robust, and more charging stations will be available. While that's occurring we'll be in the space learning and contributing to the process.

In addition to the Tesla, the LAPD is also testing out BMW's i3, which starts at less than half the cost of the Model S P85D, but lags behind the Model S in cargo and passenger capacity, range, acceleration, and top speed.

Would a Tesla Model S P85D do well on patrol duty? Perhaps not, though it'd certainly do well for highway duty; that 155mph top speed and 0-60mph time of 3.1 seconds — 2.8 if equipped with Ludicrous Mode — would certainly help in catching up to law-breaking speeders.