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Police said Vargas had no known criminal history, and they’d never responded any calls from the home. His past, they said, was "unremarkable."
"Nobody seems to know why he acted the way he acted," Zogby said.
On Sunday, residents stayed away from the building or kept inside their apartments. A few lingered in the stairways, staring from time to time at Vargas’ apartment. The front door was half burnt and a black mix of water and ash from the blaze was scattered along the walkway.
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