[unclebucknasty]

>This seems very ominous.

It does. Likewise with the casual questioning of guilt and suggestion that his/her answers will simply be taken at face value.

[lifeformed]

Why would they self report it then?

[stickfigure]

You sound like someone that expects human beings in positions of authority to operate rationally.

[unclebucknasty]

Guilty people also self-report crimes to which they are obviously close and for which they assume they'd fall under suspicion anyway. A fairly heavily trafficked, public website featuring CP images may well already be under investigation.

In any case, self-reporting does not absolve one of suspicion; else it'd be easy to get away with pretty much anything.

[fnordfnordfnord]

One might self-report if they were involved, suspected they were under investigation, and wanted to give the appearance that their involvement was unwitting.