Wales reduced police-recorded violence by 42% in its capital by encouraging hospital emergency departments to share anonymised data with law enforcement. In the “Cardiff Model”, data is analysed to isolate violence hotspots, giving policymakers information on where they should change alcohol licensing and pedestrianise streets. It has saved the city an average of $6.6 million a year in health, social and criminal justice costs.
Accident and emergency departments are reluctant to share any of their data for fear of breaching confidentiality laws. The anonymisation process was verified by the UK’s Information Commissioner, however, which has convinced most public health trusts in England to implement the model. Some challenges also arose in designing software that could safely and securely share data between hospitals and police forces, though that software has since been perfected. A final challenge is uptake by police services: ensuring that law enforcement engages with the data depends upon proactive …
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