You were near a themepark called Respawn Airsoft. Airsoft is similar to paintball except instead of goo filled balls it’s plastic bullets/balls and real looking guns. As was posted, the “To punish & enslave” Mustang cop car is from the Transformers movie. Part of their business is catering to corporate team building bullshit so I assume that’s one of their cars to pick people up at the airport.
To go further, the car in the Transformers movie is an Evil Decepticon dressed up as a cop car. So it has evil slogans on it. That look like cop car slogans.
Yep, the Decepticon is Barricadeand he’s got the “To punish and enslave on his side” rather than “To protect and serve” you can get the decals online on Amazon and other locations.