Metro

Man struck by car allegedly driven by former Cambridge police officer dies

A man hit by a car allegedly driven by a former Cambridge police officer in March has died, the Suffolk County district attorney’s office said today.

Fu Gui Jiang, 78, was found bloodied on the ground at 395 Massachusetts Ave. in Boston around 6 a.m. on March 19. Lawrence Stead, 70, of Quincy, was charged with leaving the scene of an accident causing personal injury after witnesses reported his license plate number to police.

Stead pleaded not guilty in March. Jiang died at Boston Medical Center on July 1, said Jake Wark, a spokesman for the Suffolk district attorney. He said prosecutors were investigating what role the crash may have played in Jiang’s death to determine whether additional charges will be filed.

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Two witnesses told police they saw a gray Mercury hit Jiang and then continue on Massachusetts Avenue to Columbus Avenue, where the driver got out and checked his car for damage before driving away, according to court documents.

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Police went to Stead’s home and found his car with a broken driver’s side mirror, a cracked windshield and other damage, according to the documents. Stead told police he knew he’d hit something that sounded like concrete, but didn’t see any damage or anything in the road behind him and left. Stead, a former Cambridge police officer, said he was on his way to the grocery store and then home from his job as a security guard when the accident occurred.

William Hogan, Stead’s lawyer, said he told his client that Jiang had died.

“He was extremely concerned and upset for this individual and for his family,” Hogan said.

Nestor Ramos can be reached at nestor.ramos@globe.com. Follow him on Twitter @NestorARamos.