At the same time, as of Jan. 1 the Police Department began to require that cops fill out detailed reports every time they make a street stop as part of a new state law as well as a landmark agreement worked out with the American Civil Liberties Union. The change — the result of concerns over racial profiling — has not only kept officers busy with paperwork longer than before, officers said, but also increased their anxiety about being second-guessed on whom they've stopped.