The FBI's Capture of the Silk Road

The FBI claim that while logging into the Silk Road, they were able to track the data from their capture entry back to a server in Iceland. But every time you use Tor, it packages up your data, scrambles it, and sends it all around the world before it gets to its destination. Even for the FBI,. It is just not physically or mathematically possible. So if capture didn't work, why is anyone still using it? And also why, you might ask, did we go on the dark web to look at illegal drug markets? Well, firstly, we wanted to see if they were still there, and they are. We're switching up the format a little bit