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Related Experiment Video

Updated: Apr 9, 2026

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Focused deterrence intervention to reduce serious violence: study protocol for a randomised trial.

Katharine A Boyd1, Neil Ralph2, G J Melendez-Torres3

  • 1University of Exeter, Clayden Building, Streatham Campus, Exeter, EX4 4PE, UK. k.boyd@exeter.ac.uk.

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PubMed
Summary
This summary is machine-generated.

Focused deterrence strategies show promise in reducing crime harm among repeat serious violence offenders. This randomized controlled trial assesses a light-touch intervention

Keywords:
Crime preventionFocused deterrenceRandomised controlled trialSerious violence

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Area of Science:

  • Criminology
  • Public Health
  • Law Enforcement

Background:

  • Traditional policing methods targeting repeat offenders have proven ineffective in crime control.
  • Focused deterrence (FD) strategies, integrating law enforcement, social services, and community action, show effectiveness in reducing crime.
  • Limited randomized controlled trials (RCTs) exist for FD interventions, especially for repeat serious violence offenders.

Purpose of the Study:

  • To evaluate the impact of a focused deterrence intervention on crime harm and crime counts among repeat serious violence offenders.
  • To address the limitations of current RCTs that primarily focus on crime counts, neglecting the varying harm of different crimes.

Main Methods:

  • Individuals with 3+ serious violence offenses in the past 24 months were identified.
  • Participants were randomly assigned to a treatment group receiving a focused deterrence intervention or a control group receiving usual care.
  • The intervention involved a single police visit with an empathetic talk and resource list.
  • Crime harm (Cambridge Crime Harm Index) and crime counts were measured for 12 months post-randomization.

Main Results:

  • The study is registered (ISRCTN35233331) and ongoing; results are pending.
  • Primary outcome: Total crime harm in the year following randomization.
  • Secondary outcomes: Arrests for violent crime, total arrests, non-violent arrests, and time to first arrest.

Conclusions:

  • This study will provide a comprehensive review of FD intervention impact by assessing both crime harm and counts.
  • If effective, this light-touch FD intervention could be operationally appealing for police and communities aiming to reduce crime and harm.