Knowledge and evidence

Research evidence services

The College provides access to evidence about what works in policing and crime reduction, with the aim of helping those involved in policing to make better evidence-based decisions.

This work is in support of our strategic objective of "identifying, developing and promoting good practice based on evidence". There are currently six main resources:

What Works Centre for Crime Reduction
In partnership with the Economic and Social Research Council (ESRC), we have commissioned a three-year programme to map the existing evidence base for crime reduction, label it for quality, cost and impact, and make it easily accessible.

College of Policing What Works Briefings
Our overview of what works in policing to reduce crime, plus briefings on policing and crime reduction topics developed by our researchers to summarise relevant Campbell Collaboration Systematic Reviews.

Policing and Crime Reduction Research Map
Use our map to look for shared summaries of ongoing relevant research of Masters level and above.  Relevant ongoing and completed randomised control trials are included.

College of Policing published research
Find our recently published reports, including primary research reports, toolkits and rapid evidence assessments.

National Police Library
Our Library is a unique national collection of literature about policing, crime reduction and related subjects. We also enable (e)access to the wider world of quality published research, and assist with systematic searching for information - for example, in identifying what works.

POLKA and the Knowledge Bank
POLKA is a secure online collaboration tool, enabling PNN and GSi users to share documents, discuss ideas and network. The Knowledge Bank is the central POLKA community, focused on policing and crime reduction research, practice initiatives and identifying future issues.

Get involved
Our support network, events, funding opportunities and other ways for practitioners and decision-makers to get involved in embedding an evidence-based approach in police forces.