National Crime Agency head Keith Bristow
Media playback is unsupported on your device
Video

NCA chief: 'We want to bring people to justice'

Some paedophiles with images of child abuse will escape prosecution, the head of the National Crime Agency says.

Keith Bristow said the NCA would have to focus on pursuing those who posed most risk but that others would face a "range of interventions".

Go to next video: Some paedophiles 'won't be charged'