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Ahmad Khan Rahami, the man wanted in the bombing, is the son of a man named Muhammad Rahami who runs a fast-food restaurant, First American Fried Chicken, in the ground floor of their home on Elmora Avenue, neighbors said.

The restaurant, which has employed Ahmad and some of his brothers, was such a persistent neighborhood nuisance that the city forced it to close early, said Mayor J. Christian Bollwage of Elizabeth.

When it was opened several years ago, it stayed open all night, Mr. Bollwage said.

Neighbors, including Dean McDermott, who lives on the corner of Linden and Elmora Avenues and works as a news videographer, said the restaurant drew rowdy crowds past midnight.

Often Mr. McDermott found patrons loitering in his yard and urinating in his driveway, and he called the police. Others did, too.

Responding to the complaints, the City Council passed an ordinance that would force the restaurant to close at 10 pm, the mayor said.

“The City Council voted to shut it down at 10,” Mr. Bollwage said. “They kept getting complaints from neighbors; it was a distress to people in the neighborhood.”

The Rahamis did not comply, Mr. McDermott said, and he continued calling the police when they stayed open late.

Once, he said, one of Ahmad’s older brothers got in a fight with an officer who came to shut down the restaurant. Before the case could be resolved, Mr. McDermott said, the son fled to his home country, Afghanistan.

The elder Rahami sued the city, Mayor Bollwage said. Mr. McDermott said that the lawsuit charged that Mr. Rahami had been discriminated against because of his ethnicity.

“It was neighbor complaints, it had nothing to do with his ethnicity or religion,” the mayor said. “It had to do with noise and people congregating on the streets.”

Mr. McDermott said that the Rahami family and the community came to an uneasy truce. The restaurant wouldn’t close at 10 p.m., but police stopped hassling them, and they would close at midnight or 1 a.m.