INNOVATION: With artificial intelligence (AI) advances hailed widely as a huge opportunity for law enforcement, police now face the challenge of identifying effective AI systems from those that don’t do the job; University of Cambridge PhD candidate Jacob John Verrey, and Chief Inspector Lewis Lincoln-Gordon of the National Police Chiefs’ Council AI Portfolio, argue that adapting and implementing the ‘snake oil filter’ approach used in medicine could offer policing an efficient process for assessing and deploying the right technology.