William Poirier

Associate Principal
William Poirier | Forensic Services | Charles River Associates

Mr. William Poirier is an associate principal with the Forensic Services Practice at Charles River Associates in Chicago. He has over 10 years of experience conducting investigations including digital forensics, eDiscovery, due diligence, data analytics, and large-scale compliance reviews.

William has specialized knowledge of electronic systems and has built or reassembled thousands of electronic devices including desktop computers, laptops, tablets, and smart phones. His consulting work involves all stages of litigation, including data mapping, collection/preservation, forensic analysis, data hosting, document review, document production, and remediation. William regularly analyzes computers and mobile devices to establish user activity and determine whether confidential or proprietary information was improperly accessed or exfiltrated from corporate IT systems. He has conducted forensic investigations involving trade secret and intellectual property theft, data breaches, embezzlement, data manipulation, healthcare compliance, and fraud. Prior to joining CRA, William was a Senior Managing Consultant with BRG’s Global Investigations + Strategic Intelligence Practice and a computer forensic investigator for an international valuation and corporate finance advisory company. He also has more than 20 years of experience as a photographer and has provided photographic evidence for use in court and other disputes.

William mines public records and electronic database resources to perform comprehensive and revealing due diligence background investigations of companies and individuals. Subjects have included hedge fund managers, broker-dealers, expert witnesses, international gaming operations, real estate developers, high-frequency trading firms, and academic administrators. His work has uncovered surreptitious ties to foreign governments, connections to organized crime, falsified credentials, regulatory agency actions, expunged criminal convictions, perjury, and obfuscated corporate structures.

Selected engagements

  • 01
    Investigation of $10 million embezzlement and diversion by company’s former CMO
    CRA’s Forensic Services Practice was retained by Cooley LLP’s White Collar Defense & Investigations Practice, on behalf of the board of a national insurance...
    View engagement
  • 02
    Chancellor grants default judgement for BDO based on Dan Roffman’s expert finding of spoliation by defendant
    CRA expert and Vice President, Dan Roffman, was recently retained by McDermott, Will & Emery LLP (McDermott) to testify as a forensic expert on behalf of...
    View engagement


Get In Touch