By Brad Segall

SPRINGFIELD, Pa. (CBS) — Police in Springfield, Delaware County, are moving their investigation into last week’s hit-and-run forward as they try to determine what make and model of vehicle was involved in the crash.

Police say pieces of the vehicle were recovered at the scene on North State Road where 28-year-old Thomas Quercetti of Boothwyn was struck and critically injured in the early morning hours of July 4th (see previous story).

Springfield police chief Joseph Daly says they have reassembled those parts and have been taking them to area car dealerships, hoping the mechanics can identify them.

And he says the striking vehicle should have significant front-end damage.

“We believe in this case there’s going to be damage to the left front headlight, the hood, and the windshield of the vehicle,” Daly tells KYW Newsradio.  “The victim was struck and carried 200 feet.”

Daly says there have been some leads, but so far none have panned out.  He says they also have clothing that has paint on it that will help them develop the color of the car.

Quercetti remains hospitalized in critical condition.  Daly says he’s heard reports the family has offered a reward.