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Traditional police work.
Get list of Acadia owners in the local area, and compare this list with the known neer-do-wells, and eliminate the people with steady jobs living in the "good" neighborhoods.
This should drastically limit the list of "persons of interest." Make a few discrete inquiries to determine which of the people on this list have recently paid off their "knee-knockers," or have been living "higher on the hog" than usual, e. g. new clothes, new tires, or buying their buds [more] drinks.
Keep this person(s) under observation. If the department has "mug shots," which is likely, circulate to other departments to ask scrap dealers in their areas if they recognize these individuals and if they bought anything from them in the last X days, and if so what.