A primary school teacher who used his mobile phone to photograph a semi-naked, seven-year-old pupil was jailed for two-and-a-half years last week. Ryan Price, 41, also spent months using a school computer to download and store child-abuse material.
Police said it was some of the most repugnant material they had seen.
Harrow crown court, in north London, was told that one film showed a bewildered girl, aged four, being systematically corrupted and having her "innocence destroyed".
Price showed no reaction as Judge Susan Tapping rebuked him for the grossest breach of his duty, and a betrayal of his profession, the school and parents who trusted him.