Nicolas, agreed that a good lawyer is needed. ExpertNeeded said he already has a legal team. The lawyers can be helped with an understanding of the blockchain analysis and possible evidence that is being used against their client. Blockchain analysis is a new area, so the rules and standards of evidence that apply to blockchain analysis is unclear. Knowing the types of evidence and data that can be collected, and what can and cannot be shown with analysis of this data, will likely help the legal team prepare their defense.

ExpertNeeded - Blockseer would be happy to help. We specialize in blockchain analysis.
If you would like, please email us at info@blockseer.com