Are you telling me that they can't stop people from making child pornography by identifying the children in the films and finding the perverts who do that kind of stuff? There must be mountains of other forensic evidence they can use to connect the people that actually did these crimes than the sick people that view that stuff.
There must be all kinds of techniques they can use to uncover the equipment that the stuff is made on, identifying the children that are in the the stuff, and finding the perps. I am sure that a ton of children could be saved by basic investigation techniques. But they find something like this and get money from the feds for dogs that sniff memory on the chance that someone has ratholed a usb stick with illegal stuff on it. And the long arm of the law grows longer and longer as they get tools like this and need a purpose for them.
This has unreasonable search and seizure written all over it. To go to such lengths to find a usb stick with some pictures on it seems more like a justification for an invasive use of investigative powers than a legitimate tactic to protect children from abuse. Next it will be used on investigative reporters in the interests of "national security".