Internet & Digital Marketing Expert Witness Services
Bill Hartzer has been qualified as an expert witness in matters involving SEO performance, domain ownership, online defamation, digital advertising conduct, and analytics data. He is frequently retained to analyze complex digital evidence and explain what happened online in clear, accessible terms suitable for deposition and trial. His services fall into four broad categories, each built around decades of direct, practitioner-level experience rather than academic study.
Within each category are granular sub-service pages addressing specific dispute types — from SEO malpractice and manual action penalties to domain theft forensics, click fraud, and coordinated online harassment. This structure lets counsel quickly identify the specific fact pattern in their matter and see how Bill's experience applies directly to it.
Where Bill Focuses
How Bill Assists Law Firms
Most law firms do not have an SEO, domain name, or digital marketing specialist on staff, which means the technical questions at the center of these disputes often go unanswered until an expert is retained. Bringing Bill in early — even before a formal engagement — lets counsel understand what the technical evidence can and cannot show before committing to a litigation strategy built around it.
- Reviewing case materials, technical evidence, and digital records
- Preparing written expert reports and declarations that meet Daubert standards
- Providing deposition and live trial testimony
- Analyzing search visibility timelines, ranking histories, and traffic patterns
- Applying structured forensic workflows for domain, analytics, and reputation matters
- Working with counsel representing either plaintiffs or defendants
Every engagement begins with an initial case review and conflict check, described in more detail on the engagement process and fees page. For a breakdown of specific fact patterns Bill has experience with, see the case types page.