1.   Approached by the plainclothes officers, Diallo turned and entered the building, he said, and did not keep his hands in view.

2.   At the same time, plainclothes officers, trained to spot likely smugglers, mingle with passengers.

3.   Black officers have long maintained that white officers lack sufficient training to distinguish black plainclothes officers from criminals and are too quick to shoot.

4.   A few blocks away, two plainclothes officers spotted an automobile that looked unfamiliar.

5.   A couple of times while walking home from work, Mignon said, he has been stopped by plainclothes officers, pushed against a wall and frisked.

6.   A few days after his encounter, four plainclothes officers shot and killed an unarmed African immigrant in the Bronx.

7.   A little while later, four burly plainclothes officers stopped and stared at three young men who had stopped to stare at the Gap store.

8.   A native of Beijing who lives in Hong Kong, Wong said she was pushed to the ground and kicked by a plainclothes officer.

9.   A plainclothes officer introduced himself as Jonathan Searle, a one-time painter, restorer and art historian, and now detective sergeant at Scotland Yard.

10.   A witness, Modesto Rodriguez, said that the plainclothes officers who went into the building were not easily identifiable.