You might have seen a Los Angeles police officer cruising around in a Tesla, but the force is not switching to Elon Musk's pricey electric vehicles any time soon.

In an interview with CNBC, LAPD Police Administrator Vartan Yegiyan said the police force has been testing two Model S P85D loaner cars for nearly a year, but isn't ready to go all-electric just yet.

"Is it practical now? No," Yegiyan said. But that may change over the next three to five years as the price of electric vehicles goes down and charging stations become more readily available, he added.

"Not only will the industry push toward electrification, but prices will drop on vehicles," Yegiyan said. "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."

The department has also reportedly been testing the all-electric BMW i3 and currently has more than 20 electric scooters and about six electric motorcycles for patrol officers to use. But, going all-electric in the future may not be feasible, as the department would likely need backups in case charging stations went down due to a natural disaster.

Teslas, however, might be perfect in the event of one highly unfavorable situation: biological warfare. The company's new Model X SUV comes with a "Bioweapon Defense Mode," which promises to strip the air of pollen, bacteria, viruses, and pollution before it circulates through the Model X.