Digital Forensics Expert Witnesses in California

Digital Forensics, Investigation - Digital forensics, Mobile Forensics, Cellebrite expert, Deepfake Analysis, Digital investigation, Corporate Espionage, Digital expert, Domestic Violence Evidence, Defamation, Extortion & Ransomware, Digital fraud, Data Exfiltration, Scams, Expert Witness Testimony, Slander expert, Stalking expert, Social media investigator

Wanderson Castilho | Digital Forensics & Cybercrime Expert ​Professional Profile ​With over 25 years of experience and a track record of successfully resolving more than 6,000 cases, I provide high-stakes digital forensic analysis and expert testimony for complex litigation. My expertise lies at the intersection of advanced computational science and behavioral logic, specializing in uncovering digital "smoking guns" that traditional investigations often overlook. I bridge the gap between complex binary data and clear, admissible courtroom narratives. ​Core Competencies & Case Experience ​• Complex Data Recovery: Advanced extraction of deleted, encrypted, or fragmented data from mobile devices, cloud environments, and damaged hardware. ​• Cybercrime & Incident Response: Expert investigation into ransomware, data breaches, and sophisticated network intrusions. ​Behavioral Digital Analysis: A unique methodology combining motion data (accelerometer/gyroscope) with digital footprints...

Los Angeles, California

Intellectual Property, Digital Forensics - Corporate Espionage, Information Technology, Geopolitical Risk, Financial Services Risk, eDiscovery, Cyber Crime, Trade Secret Theft

Erik Laykin is the CEO and Managing Partner of Global Data Risk LLC (GDR) Mr. Laykin manages complex investigations and disputes in a wide variety of industries including financial services, technology and international trade on behalf of litigants, corporations and government agencies. He has been recognized as one of the world’s leading authorities on Trade Secret theft and investigations and has had over 100 expert witness appointments. Mr. Laykin serves as an expert witness, investigator, Special Master and Independent Neutral to Federal and State courts in cases involving intellectual property, cyber crime, information technology failures, geopolitical risk, financial services risk, valuations, eDiscovery, corporate espionage and other complex disputes which arise from the usage of digital data, computers, software, networks and the Internet. Through his ability to distill and simplify a broad range of technology concepts and issues, his clients have successfully resolved the...

Los Angeles, California

Internet, Digital Forensics - AI Audit, Synthetic Control, Research, Defamation, Focus Groups, Litigation Consulting, Content Analysis, Survey Analysis, Network Analysis, Media Analysis, Damages, AI Bias, Artificial Intelligence, Algorithms, Social Media, Digital Evidence, Information Flow, Algorithmic Decision Making, Amplification Analysis, Reputation Harm

Diana Ascher, PhD, MBA, is an expert witness in defamation and artificial intelligence (AI) bias litigation involving digital evidence and algorithmic systems. She is retained in the largest cases—including matters seeking more than $1 billion in damages—where amplification, causation, and harm are determinative. Dr. Ascher typically is engaged at the outset of a case to assess whether technical theories will withstand evidentiary scrutiny. She works with plaintiffs and defendants.

Aliso Viejo, California

Cryptocurrency, Cybersecurity - Asset Searches, Fraud Investigations, Pig Butchering, High-Tech Fraud, Digital Forensics, Cyber Investigations, Cryptocurrency Valuation, Hacking, Cybercrime, Call Centers, Cell Phones, Divorce, Family Law, Industry Standards, EB-5

Over my 20-year career as an FBI Special Agent, I specialized in investigating complex cyber-enabled financial crimes, including cryptocurrency investment fraud, exchange compromises, SIM swapping, phishing, and account takeovers. My work extended into advanced cryptocurrency tracing, digital forensics, email and VOIP analysis, and international coordination with foreign law enforcement. I founded the FBI’s Orange County Cyber Task Force, bringing together federal, state, and local investigators to combat sophisticated cybercrime, and the investigative techniques I developed were disseminated across all 52 FBI Field Offices. From 2021 through my retirement in December 2023, I led U.S. government investigations into large-scale cryptocurrency fraud operations, including “pig butchering” schemes—now recognized as one of the most significant global crypto fraud threats. This work resulted in a nomination for the Attorney General’s Award from the Department of Justice’s National Crypto...

California

Digital Forensics, Cybersecurity - Incident Response, Ransomware, Email Compromise, Cyber Insurance, Cellular Forensics, Mobile Device Forensics, Hacking, Ransom Negotiation, Cryptocurrency, Ransom Payment, Information Technology, Network Security, DFIR, Cybercrime, Malware, eDiscovery, Data Mining, Computer, Internet, Electronic Crime

Brent Riley serves as the President of Capra Cyber, a cybersecurity and incident response consultancy with offices in the United States and the United Kingdom. He previously founded Lyra Recovery, a leading international ransomware and network recovery firm. In both of these roles, and in previous cyber consulting, Brent worked closely with cyber insurance providers and breach counsel attorneys to support companies of all sizes who had experienced cyber attacks. This included creating incident containment and recovery strategies, performing digital forensics, and managing the overall incident to ensure clients returned to operation safely and quickly. While leading these companies, Brent has also served as an expert witness in cybercrime, ransomware, business email compromise, wire fraud, insider threats, data theft, and intellectual property matters. He has rendered opinions related to these topics on behalf of plaintiffs, defendants, and as an appointed independent party. Pr...

Los Angeles, California

Computers, Information Technology - Digital Forensics, Computer Forensics, Electronic Evidence, Electronic Discovery, eDiscovery, Email Analysis, Mobile, Computers, Cybersecurity, Cyber Breach Investigations, Cyber Investigations, Incident Response, DFIR

Dr. Joseph Greenfield is the Vice President and Chief Forensic Examiner at Maryman & Associates and an award-winning educator. He is a renowned computer forensics expert with over 15 years of investigative experience, including cyber breach investigations, employee misconduct, and email recovery and analysis. He has worked over 1000 cases and analyzed over 2000 pieces of digital evidence. His is known for deep forensic analysis while being able to explain technical details to non-technical decision-makers. He has provided expert witness testimony in state, federal, and international legal matters. Dr. Greenfield is also an Associate Professor of Information Technology Practice at the Viterbi School of Engineering at the University of Southern California, where he authored the undergraduate programs in both cybersecurity and digital forensics. In 2014, the Ponemon Institute ranked USC as 6th in the nation for “Best Schools for Cybersecurity” and the highest ranked on the West Coas...

California

Artificial Intelligence, Software Engineering - AI Expert, ChatGPT, Biometric Privacy, BIPA, Facial Recognition, Speech Recognition, Cybersecurity, Mobile Forensics, Digital Forensics, Source Code Review, ESI Protocols, Patent Infringement, IPR, PTAB, Blockchain, Social Media Forensics, Trade Secret, Digital Evidence, Software Expert, Digital Forensics

Mr. Winters is a nationally recognized expert witness in AI, software, cybersecurity, biometric privacy, cryptocurrency and forensic data extraction. He offers a rare dual-role capability: both as a testifying expert and as a forensic consultant using court-admissible tools to extract and analyze digital evidence from over 31,000 devices. This integrated approach can reduce litigation costs and streamline case strategy, especially in technology-heavy matters. With over 30 years of experience, Mr. Winters has been retained in complex cases involving software architecture, AI, source code analysis, social media forensics, patent infringement, IPR, and Illinois' Biometric Information Privacy Act (BIPA). He holds patents in artificial intelligence and is a pioneer in speech and facial recognition systems, having built early voice-based AI systems adopted by Microsoft, Apple, Boeing, Honeywell and the U.S. Air Force Research Lab. He has successfully testified and been deposed in federal...