List of legal cases where Bill Hartzer has been retained as an expert witness. Updated May 2026.
Artemis Langford, Plaintiff, v. Law Office of John G. Knepper, LLC, John Knepper, individually; Longhorn Law, LLC, Casandra Craven, individually; and DOES 1-100 Defendants. District Court, First Judicial District State of Wyoming, County of Laramie. Retained as an expert witness in the case. Provided expert witness report June 2025, testified in the case (Jury Trial) May 2026.
R.W., Plaintiff, v. NW Communications of Phoenix, Inc. d/b/a KSAZ-TV; Banner Health; East Valley Urology Center, PLC; and Dr. Rahul Mehan, Defendants. Arizona Superior Court, Maricopa County. Retained as an Expert Witness in the case and testified in the case October 2025.
Commissioner Of Commerce And Insurance For The State Of Tennessee, Tennessee Insurance Division and Tennessee Securities Division, Petitioners v. Wesley Spaulding Brown, APD No. 12-06-243354J and Matter No.: 22-00070. Retained as an Expert Witness in the case and testified in the case October 2025.
Christina Nguyen, Plaintiff, v. Al Hoang, Ava Ho Truong (A/K/A My Phung), Thu Thuong Doan, Daniel Tran (A/K/A Nguyen Tien Dung or Tien Hung Tran), Nam Quan Nguyễn, and Điều Hiện T. Chau (A/K/A Phương Anh Chau Diamond), Defendants. County Civil Court at Law, Harris County, Texas. Retained as an Expert Witness in the case, prepared expert witness reports, made court appearances in July 2025 and September 2025.
Frederick N. Apugo and Krystal A. Babyemi v. Impact Diagnostic Lab & Health Services, LLC and Ulta Lab Tests, LLC and Elizabeth Akinfiresoye and Sydni Butler, Circuit Court for Prince George’s County Maryland. Retained as an Expert Witness in the case and consulted with Attorneys. Case resolved August 2025.
AMARC, Inc. v Curotec, LLC. Common Please of Montgomery County, Pennsylvania, March 2025. Prepared expert witness report, extensive SEO and website traffic research used in Mediation. Case settled June 2025.
Gerard Richard Williams III, v. Dai Duong Pham (A/K/A Derek Pham),Thu Thuong Doan, Tu Nguyen,(A/K/A Thanh Tu Nguyen) And Nhu Ta, County Civil Court at Law No. 1, Harris County, Texas. February 2025. Prepared expert witness reports related to social media posts, videos, live streams, and comments. Made court appearance related to Temporary Restraining Order in the case. Case resolved May 2025.
Michael Rowland v. KRW (aka Ketterman Rowland Westlund). Mediation, San Antonio Texas, January 2025. Prepared an expert witness report and extensive internet related research used in Mediation. Case settled in January 2025.
Mickey Schaefer & Associates, LLC d/b/a Tourism Ambassador Institute, and Arizona limited liability company, v. Tourism Academy, Inc., a Florida corporation, Stephen Ekstrom, a Florida resident, and Sheena Works, a Florida resident. United States Court for the District of Arizona, February 2024. Prepared an expert witness report, deposed in the case. Case settled November 2024.
Anicia V. Dela Cruz, Anicia V. Dela Cruz Living Trust, v. Virender K Luthra a/k/a Ravi Luthra; Ankur Luthra Krishna Business Center, Inc., dba FAB Associates, Luthra Trust, Shanda Natasha Love, PLM Loan Management Services, Inc.. Retained as an expert witness in the case. Deposed in the case, Case settled October 2024.
Stephen Chagares, M.D., Plaintiffs, v. Plaintiffs, Monmouth Medical Center, Monmouth Medical Center Faculty Practice Plan, Inc., Barnabas Health, RWJ Barnabas Health, Bill Arnold, Barbara Mihelic, Joseph Jaeger, Dr. P.H., Dr. Tom Heleotis, Eric Carney, Dr. Manpreet Kohli, Dr. Negin Griffith, John Does 1-100 (fictitious names), and ABC Companies 1-100 (fictitious names), defendants, and, Monmouth Medical Center Barnabas Health, RWJBarnabas Health, Bill Arnold, Barbara Mihelic, Dr. Thomas Heleotis, Eric Carney, and Dr. Manpreet Kohli, defendants/third party plaintiffs, v. The Plastic Surgery Center, The Institute for the Advanced Reconstruction at The Plastic Surgery Center Shrewsbury, Andres Elkwood, M.D., Dr. Antonio Toesca, Marianne Maggs, Nicholas Fotopoulos, Kristie Rossi, John Does A-C (said names being fictitious), and John Does D-F (said names being fictitious), third party defendants. Superior Court of New Jersey Law Division: Monmouth County Docket No: MON-L-4063-19 Civil Action. Online reputation and social media reputation case. Retained as an expert witness, prepared an expert witness report, deposed in the case. October 2024.
Benchmark Towing Systems, LLC, and Heavy Duty Towing, San Antonio, LLC, doing business as San Antonio Heavy Duty, plaintiffs, Civil Action No. 5: 23-cv-614, v. Chacon Business Group, Inc., Chacon Business Group, LLC, Chacon Heavy Towing LLC, Luis Esteviz Chacon III, and Lance E. Chacon IV, defendants. United States District Court for the Western District of Texas, San Antonio Division. Retained as an Expert Witness. October 2024.
Tamera Sweeton, on behalf of herself and others similarly situated, and Jason Moss, on behalf of himself and others similarly situated, plaintiffs, v. WebMD, LLC, defendant. Case No. 4:23-cv-00094-BCW. United States District Court for the Western District of Missouri at Kansas City. Retained as an expert witness, prepared an expert witness report. Case resolved March 2025.
Jonathan Kindler, on behalf of himself and other members of the putative class, plaintiffs, v. Healthgrades Marketplace, LLC, defendant. Case No. 2316-CV00209 In the Circuit Court of Jackson County, Missouri at Kansas City. Retained as an expert witness. Case resolved.
Tamera Sweeton, on behalf of herself and others similarly situated, and Jason Moss, on behalf of himself and all others similarly situated, plaintiffs, v. Vitals Consumer Services, LLC, defendants. Case No. 4:23-cv-00088-BCW. In the United States District Court for the Western District of Missouri at Kansas City. Retained as an expert witness. Case resolved March 2025.
PPH Enterprise Solutions Limited v Go Up Ltd.. High Court of Justice, Queen’s Bench Division, United Kingdom. Retained as an expert witness by the Defendant, June 2022. Prepared an expert witness report, other related consulting regarding search engine data, analytics data needed in the case. Case Settled in mid 2024.
Crowley, Hoge & Fein, PC v Yoseph Seyoum (Joe Seyoum) v. Christopher G. Hoge, Circuit Court for Montgomery County Maryland. Case Number C-15-CV-22-004124. Prepared several expert witness reports in the case. Deposed in the case. December to October 2024.
William Willner, plaintiff, v. Seilevel Partners, LP, doing business as Blue Fish Development Group, Ltd, Lisa Hill, Joy Beatty, and Anthony Chen, defendants, in the 201st Judicial District, Travis County, Texas. CAUSE NO. D-1-GN-21-002460. Retained as an expert witness, October 2023.
Express Gold Cash, Inc., v. C.J Environmental, Inc. d/b/a CashforGoldUSA.com, Emma Johnson Inc., d/b/a WealthySingleMommy.com, Steer Digital Ltd., Daniel Brown, and Adam Toutain. Case Number 1:22-cv-352, United States District Court Western District of New York. Retained as an expert witness by the Plaintiff, August 2022. Prepared an expert witness report.
San Juan Products, Inc., and American Environmental Container Corp. v. River Pools and Spas, Inc., River Pools Franchising, Inc., Thursday Pools LLC, Jason Hughes, Jim Spiess, Marcus Sheridan, Cristian Shirilla, Alex Planes, Does 1-10, inclusive. Case Number 8:21-cv-02469-TPB-JSS, United States District Court For the Middle District of Florida, Tampa Division. Retained by the Defendants, July 2022. Prepared an expert witness report. Deposed in the case December 2022. Case resolved.
Product Manufacturer, Intellectual Property Report. Hired by an Orlando, Florida based Law Firm to research and provide my opinions in the form of an expert report related to internet search engine results and archived internet web pages. June 2022.
Bob Agahi and Valley East Properties, LLC v. Kevin Richard Kelly and Krista Kelly, Case CV2021-009873, Arizona Superior Court, Maricopa County. Retained as an expert witness by the Defendants, April 2022. Prepared an expert witness report.
Todd Graves Golf School, LLC v. Kirk Alan Junge, D/B/A Single Plane Golf Schools, Civil Action No. 9:21-cv-80793-AMC, United States District Court, Southern District of Florida, West Palm Beach Division – Retained as an expert witness by the Plaintiff, January 2022. Prepared an expert witness report and supplemental report, deposed March 2022.
William Handel, Karen Synesiou, CSP Holdco, Inc., v Ovation Fertility, FPG Services, LLC, FPG Labs, LLC, and Does 1-20, Case Number 20STCV17139, Superior Court of the State of California for the County of Los Angeles. Retained as an expert witness by the Plaintiff, December 2021. Prepared expert witness report June 2022, Deposed August 2022. Case completed February 2023.
O’Connor Enterprise Group, Inc., DBA EPC Group, v. Kaiser Group Ventures, LLC and Aaron Kaiser, No. 2020-71475, District Court of Harris County Texas, 164th Judicial District – Retained as an expert witness by the Plaintiff, May 2021. Prepared an expert witness report, October 2021.
Soter Technologies, LLC v IP Video Corporation, A+ Technology & Security, Inc., & Advance Convergence Group, Inc., Civil Action No. 20-cv-05007-LJL, United States District Court For The Southern District of New York – Retained as an expert witness by the Plaintiff. May 2021.
Paid Search Engine Tools, LLC v. Google Canada Corporation, Google LLC, and Alphabet Inc., Docket Number T-40-18, Ottawa, Ontario, Canada (Federal Court) – Retained as an expert witness by the Plaintiff, December 2020.
St George Executive Shuttle, Inc. v. Western Trails Charters & Tours LLC, d/b/a Salt Lake Express, Civil Action No. 2:17-cv-00900-BCW, United States District Court for the District of Utah Central Division – Retained as an expert witness by the Plaintiff. Prepared an expert witness report, August 2020.
Michelle Schilling v. Frank Schilling, Cause Number FAM 227 of 2017, Grand Court of the Cayman Islands – Retained as an expert witness by the Plaintiff. Prepared an expert witness affidavit (submitted to the court). Testified in the Grand Court of the Cayman Islands, October 2019.
John Hart v. Michael Galantino, John Walker, Case Number 1106, Court of Common Pleas of Philadelphia County – Civil Division – Retained as an expert witness by the Plaintiff. Prepared an expert witness report, August 2019.
Opportune, LLP v Oportun, Inc. and Oportun, LLC, Case Number 4:18-CV-7, United States District Court for the Southern District of Texas, Houston Division – Retained as an expert witness by the Defendant. Prepared an expert witness report, provided rebuttal report, deposed, August 2019.
A.B. Cernelle v. Graminex, LLC and Cynthia May, Case Number 03-10291 – Retained as an expert witness. Prepared an expert witness report, testified in Federal District Court, Detroit, in April 2019. Retained by the Plaintiff, A.B. Cernelle.
New England Based Marketing Company – Retained as expert witness in upcoming Online Reputation Management case. Case has not been filed yet. Retained by the Plaintiff in 2019.
RGB Plastic, LLC dba Restaurantware v. First Pack LLC dba Pack N Wood, Case No. 17-cv-6283. Retained as an expert witness by the Plaintiff. United States District Court for the Northern District of Illinois, Eastern Division. Retained by the Plaintiff, RGB Plastic, LLC dab Restaurantware.
XYZ Media, Inc. v. Mark Maris, Adam Alfia, Michael Terrell, and Lead Crank, LLC – Civil Action No. 3:17-cv-00854-B. Retained as an expert witness in SEO and lead generation case by one of the Defendants. United States District Court for the Northern District of Texas. Retained by the Defendant.
Christopher Hamilton v. Summa Consulting – Case 37-2014-00011235-CU-FR-CTL – Retained as SEO and Domain Name expert witness. Superior Court of the State of California for the County of San Diego. Retained by the Defendants.
Brightedge Technologies, Inc. V. Searchmetrics GMBH and Searchmetrics, Inc. – Case 3:14-cv-01009 WHO – Retained as an SEO expert witness by the Plaintiff, June 2017. US District Court for the California Northern District.