Welcome to the Crime Reduction Toolkit

The Crime Reduction Toolkit summarises the best-available research evidence on what works to reduce crime. 

It allows users to see the impact of different interventions on crime and understand how they work, where they work, how to implement them and their cost.  The Toolkit can be viewed in table mode and bubble mode; both of which draw on the same research evidence.

Bubble Mode


Table Mode


​Copyright of the EMMIE Framework is attributed to authors; Professors Shane D. Johnson, Kate J. Bowers and Nick Tilley.

The EMMIE Framework is reproduced under the terms of the Creative Commons Attribution licence 4.0           

The following academic paper on EMMIE was published in the Journal of Experimental Criminology.
Johnson, S. D., Tilley, N., & Bowers, K. J. (2015). Introducing EMMIE: An evidence rating scale to encourage mixed-method crime prevention synthesis reviews. Journal of Experimental Criminology, 11(3), 459-473.


​The Crime Reduction Toolkit was awarded silver prize at the Digital Impact Awards 2020 for best use of digital from the public sector

​The Crime Reduction Toolkit has been awarded a Best Practice certificate in the European and National Level category at the European Public Sector Awards 2017

© College of Policing Ltd (2021).  All Rights Reserved.  No part of the Crime Reduction Toolkit may be reproduced, modified, amended, stored in any retrieval system or transmitted, in any form or by any means, without the prior written permission of the College unless expressly permitted by law.  Anyone wishing to copy or re-use all or part of the Crime Reduction Toolkit for purposes other than expressly permitted by law will need a licence.  Licence applications can be sent to the Copyright and Licensing team by email: Copyright&Licensing@college.pnn.police.uk