So, there are some 6,000 (maybe more) white 2011-2013 Elantras nationwide, whose title numbers will be issued to LE in Moscow. They will then have to sort through it all. Many of them will have an owner's address and name that no longer correspond to the car (the person has moved, car was "sold," registration never redone - or no registration, esp. in college towns).
Students "abandon" cars to others, until they are - ultimately - abandoned from the point of view of either the city, county or college. It's even possible that the car truly didn't have registration or plates that are current (out of state California plates, for example - Californians don't surrender plates when they transfer ownership).
Last known owner is the person who LE wants to come forward, for sure. They will have many guesses about who is driving around in their car and give an amazing lead.
Quicker than genetic genealogy, IMO.
But now we need the Elantra owner to be found or come forward, so LE can find the person they are interested in.