BOSTON » Authorities say a 72-year-old woman who was knocked to the ground in Boston has died soon after a cameraman working on the new "Ghostbusters" movie helped them track down the person who did it.

The Suffolk district attorney’s office reported the woman’s death Thursday.

Authorities say the woman bumped into Tajanetta Downing on Wednesday in Chinatown. They say Downing pushed the woman, who hit her head on the pavement. They say Downing kept walking but said she heard a bystander ask the woman if she was OK.

Police say they located Downing with help from a "Ghostbusters" cameraman who saw what happened.

Downing is from Lawrence. She’s jailed on assault charges. Her lawyer hasn’t returned a call seeking comment.

Authorities haven’t released the victim’s name. The cause of her death hasn’t been determined.