LIMA, Ohio — The air of Southside is foul-smelling and thick, filled with fumes from an oil refinery and diesel smoke from a train yard, with talk of riot and recrimination, and with angry questions: Why is Tarika Wilson dead? Why did the police shoot her baby?

“This thing just stinks to high heaven, and the police know it,” said Jason Upthegrove, president of the Lima chapter of the N.A.A.C.P. “We’re not asking for answers anymore. We’re demanding them.”

Some facts are known. A SWAT team arrived at Ms. Wilson’s rented house in the Southside neighborhood early in the evening of Jan. 4 to arrest her companion, Anthony Terry, on suspicion of drug dealing, said Greg Garlock, Lima’s police chief. Officers bashed in the front door and entered with guns drawn, said neighbors who saw the raid.

Moments later, the police opened fire, killing Ms. Wilson, 26, and wounding her 14-month-old son, Sincere, Chief Garlock said. One officer involved in the raid, Sgt. Joseph Chavalia, a 31-year veteran, has been placed on paid administrative leave.

Beyond these scant certainties, there is mostly rumor and rage. The police refuse to give any account of the raid, pending an investigation by the Ohio attorney general.

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