Anger is a gift (Happy 3rd Anniversary!)

[Alex]

The four major federal agencies involved in child pornography investigation have always been U.S. Immigration and Customs (to keep it from being shipped to the country and more specifically to prevent children from being brought into the country specifically for sexual exploitation), Department of Justice (obviously), U.S. Postal Inspection Service (the mail police), and the Secret Service.

Customs and Secret Service used to be part of the Department of Treasury (Customs did the investigative work and Secret Service provided forensic and technical services) and when both agencies were moved to DHS these roles went with them. There are a lot of functions under DHS now that have nothing to do with terrorism (which is a big part of the problem with DHS and helped contribute to the FEMA fiasco).