A total of $7,500 in rewards is being offered for information on suspects in the Oct. 25 shooting of a U.S. Park Police officer on the Baltimore-Washington Parkway and the Oct. 16 destruction by arson of the historic Marshall Hall plantation house across the Potomac River from Mount Vernon.

Park police are offering $5,000 for information leading to the arrest of two suspects in the shooting of officer Kelso David Wallace, who is still partially paralyzed from three bullets fired at him while he was making a routine traffic stop on the parkway. Two of the bullets are still lodged in his neck and chest.

The suspects are David Fountain Kimberly, 35, and Sandra Lynn Whatley, 21, both of Tennessee. Kimberly, who allegedly shot officer Wallace, is wanted on other criminal charges and reportedly helped Whatley escape from a Tennessee prison this fall, according to National Park Service spokeswoman Sandra Alley. Whatley is considered an accessory to the shooting, Alley said.

A $2,500 reward for information leading to the arrest and indictment of the person or persons who set fire to Marshall Hall is being offered jointly by the park service, the Maryland State Fire Marshal's Office and the Charles County Crime Solvers Board. The reward will be effective for information received on Dec. 17 or later.

The park service acquired the 256-year-old Marshall Hall mansion when it bought the Marshall Hall Amusement Park in 1974 and incorporated it into Piscataway Park, created by Congress in 1961 to preserve the view from Mount Vernon.

The park service was in the process of restoring the mansion at the time of the fire. Alley yesterday estimated the damage, which left only the brick walls standing, was at least $200,000 to $300,000.

Anyone with information about the shooting of officer Wallace or the Marshall Hall fire should call U.S. Park Police at 472-4393.