that´s what it is all about:

"Additionally both OXT and CipherTrace, Sterlingov's main expert witness and a direct competitor to Chainalysis, were effectively barred from review of Chainalysis proprietary blackbox heuristics. CipherTrace was set to testify against Chainalysis heuristics and application of block chain forensics use as a primary attribution methodology in criminal prosecution. However one week before trial, CipherTrace was pulled from the case by their wholly owned subsidiary, MasterCard.

This meant that blackbox software, heuristics, and forensic methodology went completely unchallenged during trial allowing the government to railroad Roman Sterlingov and obtain their desired guilty verdict for a crime he did not commit.

This affects all Bitcoin related legal cases from that point on, until an appeal overturns the validity of this "expert witness". Whatever statement this unchecked third party makes on any activity on Bitcoin's blockchain, is now admissible evidence in a trial case. And as was demonstrated in Roman Sterlingov's case, you are likely not allowed to provide an expert witness of your own on the same subject matter."