University of Surrey Unveils AI Tool to Aid Knife Crime Policing

The Knife Hunter system aims to improve identification and tracing of knives to support law enforcement in England and Wales.

Researchers at the University of Surrey have developed a new artificial intelligence (AI) tool, named Knife Hunter, designed to assist police forces in the identification and tracing of knives involved in crime.

Launched in collaboration with the Metropolitan Police, this system is poised to enhance the operational efficiency of law enforcement agencies in managing knife crime.

The Knife Hunter system utilizes a comprehensive dataset featuring over 25,000 images across 550 different types of knives.

This capability allows it to recognize even minor distinguishing characteristics of knives, regardless of factors such as viewing angle or lighting conditions.

The tool's primary functions include logging weapons that are found, recovered, or seized; tracing their retail origins and illegal import channels; and analyzing geographical trends pertaining to knife crime incidents.

By generating reports that outline patterns related to knife crime, the system aims to provide vital data to support law enforcement strategies and inform public policy.

Knife crime has seen a notable increase in the UK, with over 50,000 offences reported in England and Wales in the year leading up to June 2024, marking a 4% rise in incidents compared to the prior year.

According to Professor Miroslaw Bober, the lead researcher for the project, there is optimism about the potential broad implementation of Knife Hunter across various police forces and local authorities.

The tool was previously tested during the Metropolitan Police's Operation Spectre, an initiative aimed specifically at addressing knife crime.

Professor Bober stated, "For the past three years, we’ve partnered with the Metropolitan Police to develop a system that we believe could revolutionise how forces across the country tackle knife crime in the not-too-distant future." He emphasized that Knife Hunter significantly enhances the speed and efficiency with which police can process and analyze images and video evidence relating to knives.

Professor Adrian Hilton, the director of the Institute for People-Centred AI, expressed confidence in the societal benefits of this technology, noting that it exemplifies the shift towards leveraging AI for public good amid ongoing discussions regarding AI policy in the UK.

Moreover, Science and Technology Minister Peter Kyle highlighted the potential of AI technologies to aid law enforcement in preventing violent incidents and saving lives.

He remarked that the development of Knife Hunter represents just the beginning of AI's capacity to positively influence various sectors, including healthcare and productivity.

As law enforcement continues to grapple with the complexities of knife-related offenses, the introduction of Knife Hunter reflects an innovative approach to the challenges posed by urban violence, demonstrating the intersection of advanced technology and public safety.