‘Knife Hunter’ AI tool hopes to cut down on UK knife crimes

Global policing efforts to combat rising knife crime have gained a powerful ally with the development of Knife Hunter, an AI-based tool created by Surrey University’s Institute for People-Centred AI in partnership with the Metropolitan Police. Knife crime in England and Wales saw a 4% increase from 2023 to 2024, with over 50,000 offenses recorded during this period.

System capabilities and design: Knife Hunter leverages artificial intelligence to identify and catalog knives while tracking their origins and patterns of use in criminal activities.

• The AI system has been trained on more than 25,000 images spanning 550 different knife types
• The technology can detect minute distinguishing features of weapons regardless of viewing angle or lighting conditions
• Police can use the tool to quickly record and process weapons that are found, recovered, or seized

Implementation and testing: The Metropolitan Police has integrated Knife Hunter into their existing anti-knife crime initiatives to enhance their operational capabilities.

• The system is being trialed as part of Operation Spectre, the Met’s dedicated program to combat knife crime
• Early results suggest the tool could streamline the processing and analysis of weapon-related evidence
• Researchers anticipate potential deployment to other police forces and local authorities across the UK

Key benefits and features: The system’s comprehensive approach combines efficient data collection with advanced analysis capabilities.

• Enables rapid weapon identification and cataloging for law enforcement
• Generates detailed reports on knife crime patterns to inform policing strategies
• Provides data-driven insights to support policy development and community safety initiatives

Expert perspectives: Leading researchers and law enforcement officials have expressed optimism about the system’s potential impact.

• Prof Miroslaw Bober, the project lead, emphasizes the system’s potential to transform knife crime investigation methods across the country
• Prof Adrian Hilton, director of the Institute, highlights how people-centered AI technology can positively impact communities
• Law enforcement partners view the tool as a significant advancement in weapons tracking and crime prevention

Looking beyond the numbers: While Knife Hunter represents a significant technological advancement in law enforcement tools, its success will ultimately depend on effective integration with existing policing strategies and community engagement initiatives, as well as the ability to adapt the system based on real-world performance and feedback from front-line officers.