The new head of the FBI's Cincinnati division says agents are conducting a thorough review of last year's fatal police shooting of a black man in a suburban Dayton Wal-Mart store.

Angela Byers recently became the division's special agent in charge. She told The Associated Press that investigators are going through the case "with a fine-tooth comb." She says that takes a while, so there's no timetable for completion.

She declined to discuss details.

Byers says agents are working with the U.S. Attorney's Office and the Justice Department's Civil Rights Division.

Federal authorities announced plans for independent review after a grand jury declined to indict police in the Aug. 5 death of 22-year-old John Crawford III. Police said they believed he had a rifle; it was an air rifle.