I tried tracing Bitcoin transactions once. Not being a security professional in any way, you should take my opinion with a grain of salt, but what I found was t

I tried tracing Bitcoin transactions once. Not being a security professional in any way, you should take my opinion with a grain of salt, but what I found was that if you send the coins through a mixer, it's probably impossible to figure out where they went afterwards. There's just way to many ways to obfuscate where they ultimately end up, with even a bit of effort. With proper precautions, I would not expect to be tracked down through the coins themselves.