Of course the perpetrators of child abuse would be adjacent to child abuse material. That's why the material needs to be indexed, to make sense of it and round up the rest of the perpetrators.

correct

i can say that 90% of the work was in making sense of the data, indexing, processing, etc

Police and prosecutors have such a great time cataloguing criminals' activities--let's imply that they love crime.

Way to miss the point entirely.