The Home Office: Reducing the risk of violent crime: Report by the Comptroller and Auditor General / TSO, 21 February 2008
HC 241
PDF - http://www.nao.org.uk/publications/nao_reports/07-08/0708241.pdf
Executive summary
http://www.nao.org.uk/publications/nao_reports/07-08/0708241es.pdf