Crime Stoppers is offering up to $1,000 in reward money for information leading to the arrest of a driver who fled from a collision that killed a horseback rider and injured a 6-year-old boy.

Police say a 2003 to 2005 silver or gray Mercury Grand Marquis likely struck the horse carrying 49-year-old Lloyd Ferguson and the child on July 5. The Wichita Eagle  reports that Ferguson died, and the child has been hospitalized. The horse was euthanized.

Investigators are using parts of the car knocked off by the collision to identify the vehicle.

Two witnesses who tried to help the man and boy were hit by a different car shortly after the first collision. The two witnesses were injured but are now at home recovering. The second vehicle stopped.
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Information from: The Wichita (Kan.) Eagle