New York Police Department

It's been used too often as a reason to approach and penalize people engaged in non-violent misdemeanors.

• By Mike Rowan

Stop-and-frisk may have gained notoriety in New York City, but a new analysis finds Chicago police stops people more often than their New York counterparts do, and is less transparent about it.

• By Francie Diep

Mathematicians propose using the “Lévy flight” model to reveal and police hotspots of crime.

• By Lauren Kirchner

If the NYPD is going to have a stop-and-frisk policy at all, shouldn't it be the most efficient stop-and-frisk policy possible?

• By Michael Todd