 In the city, crime rate decline begun in 1991 under Mayor David Dinkins and continued through next two decades under Mayors Rudolph Giuliani and Michael Bloomberg.Some observers credited the “broken windows” approach of law enforcement where minor crimes like evasion are routinely prosecuted, and statistical crimefighting tools, whereas others have indicated different reasons for crime reduction.Regardless of causality, evasion checks resulted in many arrests for outstanding warrants or weapons charges, likely contributing somewhat to public safety improvements.