In this article, detailing the Australian and then worldwide investigation of a particularly heinous child-abuse ring, there are a lot of details of the pedophile security practices and the police investigative techniques. The abusers had a detailed manual on how to scrub metadata and avoid detection, but not everyone was perfect. The police used information from a single camera to narrow down the suspects. They also tracked a particular phrase one person used to find him.
This story shows an increasing sophistication of the police using small technical clues combined with standard detective work to investigate crimes on the Internet. A highly painful read, but interesting nonetheless.
from Interesting Internet-Based Investigative Techniques
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