This is the chilling moment cops snared an armed paedophile walking a six-year-old girl home after identifying him with hi-tech facial recognition cameras.
Convicted sex offender David Cheneler, 73, 'could have gone on to abuse' the child after befriending her mother, who was unaware of his horrific crimes spanning six decades.
The bearded predator was caught after triggering a live facial recognition camera deployed on Denmark Hill, in south-east London.
The technology films people walking past and generates an alert for police if there is a match with a watchlist of offenders.
After being matched on the system of wanted criminals, Cheneler was stopped by officers in the street on January 10.
