Bystanders watched and recorded, as the woman appeared to break a window of a rooming house, pour gasoline inside, and set it on fire.
No one seemed to try to stop her.
As the suspect got away, a woman jumped out of the window to safety.
The flames quickly raced through the home, from one floor to the next.
A group of young men attempted a rescue by kicking in the front door. But as thick smoke poured out, they were unable to reach a 72-year-old man trapped inside.
The woman's family said the suspect recently had a fight with her boyfriend who lived in the house.
He was not home at the time of the fire.
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