A 16-year study by Professor David Weisburd of the Hebrew University of Jerusalem Institute of Criminology has shown that 50% of city crime occurs in 5% of the streets. Traditional crime fighting focuses on the criminals but Stockholm Prize-winner Weisburd has changed perceptions.
http://www.huji.ac.il/cgi-bin/dovrut/dovrut_search_eng.pl?mesge136001986605872560