Matteo Messina Denaro: on the left is a picture taken when he was about 30; in the centre is an age-progressed image made before his arrest; on the right, a photo of Denaro following his arrest this year. EPA February 20, 2023 Machine learning is helping police work out what people on the run now look like Peter Hancock, University of Stirling and Charlie Frowd, University of Lancashire How do police forces make artificially aged images of people who have been missing for years?