Yes. I'd imagine that along with some sort of Ring camera/CCTV footage, the vehicle description may have been given by a resident(s) in the neighbourhood as suspicious or simply running in the early hours of the morning. We don't know all the details of why LE are trying to locate the vehicle.
Imagine you're a neighbour getting up out of bed, or still being awake around 4am and happen to notice a running car (or even parked with engine off, perhaps in a spot not usually used for parking) on the street outside, near the property? You may or may not think anything of it, as it could be anything from an Uber driver to someone being dropped off/picked up, you PROBABLY wouldn't be concerned enough to take down a plate number, but it would be something you'd remember and pass on to LE once the events of that morning came to light.
Unless the hypothetical person in the scenario above knows their car brands and model names ultra confidently, which LE then inform the public of in the belief this person is absolutely certain of the vehicle make, model and year, i'd suggest it was also paired with a profile clip from a Ring camera/CCTV around the same time and voila, you have a potential suspect.