SAN FRANCISCO --
A homeless woman now faces arson charges in two recent building fires and investigators believe she might be linked to a recent string of car fires around San Francisco.
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The surveillance video shows a fire being set outside of Highland Technology on Otis Street on July 24.
Police think Fafa Chan might have started it. Chan had been convicted of setting six cars on fire in Reno, Nevada back in 1990.
Eleven different fires have damaged or destroyed at least 13 vehicles across San Francisco recently.
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