Care to expand on the burner phone part?
Pattern matching has been successfully applied to phone logs between seemingly randomized src and dst phones. I'm busy at work and terrible at communicating clearly but what I am trying to say is that even when person A is using multiple phones and person B is also using multiple phones, there is still enough of a pattern involved such as call lengths, time of calls, etc to be able to sniff out and match these seemingly random devices to specific users.
I would have to dig up papers/reports on times this has been successfully done and reported publically.
But my point is that even running shit through coin mixers etc there is a high probability of there /still/ being enough latent information floating around to suss out a track between src and dst of blockchain transactions.
The Hezbollah Connection https://www.nytimes.com/2015/02/15/magazine/the-hezbollah-co...
https://archive.ph/4uWfM#selection-1937.0-1937.13
Section 5+
> they could see that a given assassin had an “operational phone in his front pants pocket” and “in the back pocket a phone that he used to call his girlfriends.”