Arrest footage of child rapist Martyn Armstrong released by the NCA

A prolific and “evil” child rapist has been jailed for life after being unmasked using new technology developed in the UK that unpixelated an image of his face found in photos he had taken of himself abusing his victims.Martyn Armstrong, from Pembrokeshire, documented himself committing “depraved” acts against three children, including a victim as young as one, over a number of years and posted the pictures to the dark web.The 50-year-old was arrested in July last year after officers developed the never before used tool.