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Attorney · Blockchain Investigations
Felix Williams
Felix Henry Williams
Blockchain tracing · Digital asset forensics · Litigation support
Felix Henry Williams is an attorney at W.S. Johnson LLP focused on blockchain investigations and digital-asset forensics. He combines a computer-science background with legal practice to turn complex on-chain records into evidence prepared for litigation.
Born 1985 · 41 in 2026
BACKGROUND & APPROACH
Felix Henry Williams
Born in 1985, Felix Henry Williams works at the intersection of blockchain technology, financial investigation and legal evidence. His practice focuses on tracing digital-asset movements, analysing suspected money-laundering routes and preparing technical findings for use in disputes and litigation.
As a technical lead within the team, Felix supports digital-asset disputes, trading-platform issues and cross-border matters. His work connects on-chain transactions with exchange records, account information and the wider factual history of a case.
Felix leads a trace–verify–preserve workflow: trace the movement of assets, verify the available records and preserve the resulting evidence in a documented form. He works with the legal team to explain technical findings clearly and to prepare reports and visual material for court proceedings.
Education
Master of Laws (LL.M.)
NYU School of Law · Focus on digital-asset law
B.S. in Computer Science
Carnegie Mellon University
Professional experience
2018–present
Attorney · W.S. Johnson LLP
Responsible for blockchain investigations, digital-asset forensics and the preparation of technical evidence for the legal team.
2016–2018
Senior Investigative Analyst · Elliptic
Focused on tracing cryptocurrency-related money laundering and analysing digital-asset transaction activity.
2008–2016
Technical Consultant · Technology start-ups
Advised technology businesses and participated in early blockchain-project development.
Core areas of practice
Blockchain tracing investigations
Analyses digital-asset flows, including transaction routes involving mixers and cross-chain bridges.
Digital-asset forensics
Extracts, preserves and verifies on-chain transaction data, with a focus on a documented and complete evidential record.
Trading-platform verification
Works with exchanges to verify available account balances, transaction records and user-identity information.
Litigation support
Translates technical reports into clear legal explanations and assists the team in presenting findings in court.
Technical capabilities
Chain-analysis tools
Experience using Chainalysis, Elliptic and TRM Labs for transaction analysis and investigative work.
Data visualisation
Creates clear transaction-network diagrams to make complex asset movements easier to assess and explain.
Evidence preservation
Uses hash verification, timestamping and documented preservation procedures to support the integrity of digital evidence.
Cross-chain analysis
Traces asset movements involving cross-chain bridges, mixers and privacy-focused cryptocurrencies.
Selected work & professional involvement
50+ digital-asset cases
Firm-reported participation in forensic evidence work across more than 50 digital-asset matters, with a reported evidence-acceptance rate of 95%.
Contribution to the team's work
Assisted the team in its reported work involving nearly US$26 million in cryptocurrency assets. This refers to the same team figure shown in Viktor's profile.
A repeatable forensic workflow
Developed a standardised process for digital-asset tracing and evidence preservation used within the team.
Industry participation
Invited to speak at industry summits on topics at the intersection of blockchain security and legal practice.
Before a matter begins
Describe the event and the questions you want assessed. The responsible attorney, scope of work and fees are agreed before an engagement begins. Please do not send passwords, private keys or recovery phrases.
Biographical information and reported results supplied by the firm. Past results do not guarantee a similar outcome; each matter depends on its facts and applicable law.