Our Team

Our Team

Bill Pellerin



Bill Pellerin is the founder and President of Texas Investigative Network, Inc., a Texas Corporation founded in 1994. The company employs licensed investigators in Austin, Corpus Christi, Dallas, El Paso, Fort Worth, Houston, Lubbock, McAllen and San Antonio, Texas, and conducts investigations for several major Texas corporations, law firms, insurance companies and financial institutions.

Bill also maintains a global network of highly capable, trusted professionals who are aligned with T.I.N. to conduct investigations of matters involving Corporate Theft, Embezzlement, Intellectual Property Violations, Copyright/Trademark Infringements, Commercial Litigation, Electronic Countermeasures, Computer Forensics, Cybercrimes, Financial Account Research, Insurance Claims/Fraud, Mobile/Stationary Video Surveillance, Polygraph Examinations, Executive Protection and Research/Due Diligence.

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Texas Department of Public Safety – Private Security Bureau (1987)

Special Designation/Credential
TCI, Texas Certified Investigator (2013)

Specialty Areas

  • Commercial Litigation
  • Corporate/White Collar Theft
  • Insurance Fraud
  • Financial Account Research
  • Intellectual Property matters
  • Covert Surveillance


  • Effective Use of Investigators in Litigation
  • Case Intake – Asking the Right Questions Up-Front
  • Why, When & How of Investigations in the Legal Profession


  • Texas Association of Licensed Investigators
  • National Council of Investigation and Security Services
  • Council of International Investigators
  • ASIS International
  • Crime Stoppers of Houston


University of Houston, B.S. in Criminal Justice (1990)
University of Houston, Bachelor of General Studies (1988)
Texas A&M University; Corps of Cadets (1981 – 1985) and Varsity Football Team (1982 – 1984)


  • Married with 8 children
  • Parishioner at Annunciation Catholic Church
  • That Man is You Program
  • Coach, Youth Sports

Jeff Dillender

Case Manager


In 2016, Jeff Dillender joined Texas Investigative Network, Inc., as a Case Manager. Jeff has management and operational responsibilities for the work product of 25 investigators in Texas and maintains direct communication with all field investigators to ensure that all case objectives are met.

Prior to joining T.I.N., Jeff spent over ten years as a contract, covert surveillance Investigator for several national investigation agencies, including T.I.N. Jeff’s assignments centered on worker’s compensation claims, personal injury claims and litigation, infidelity, child custody, divorce, and subject/witness locates. Jeff has also served as a guest speaker at The University of North Texas College Private Investigator Certification Program. Jeff’s extensive training, knowledge, and experience as a Private Investigator has earned him an impeccable reputation with many national insurance companies and attorneys throughout the U.S.

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Jeff has spent his entire life in the greater Houston area, graduating in the National Honors Society Program from Lamar Consolidated High School in the Lamar Consolidated Independent School District, where he was a three-year letterman for the baseball team. Jeff also attended Stephen F. Austin University in Nacogdoches, TX.

Currently, Jeff conducts, manages and supports T.I.N. related matters involving Background Investigations, Corporate Theft, Commercial Litigation, Insurance Claims/Fraud, Mobile/Stationary Video Surveillance, Due Diligence, Subject Locates, and Government/Courthouse Records research.

Lexy Llewellyn

In-House Investigator


In 2020, Lexy Llewellyn joined Texas Investigative Network, Inc. as an In-House Investigator. Prior to that, Lexy commissioned through West Virginia University’s ROTC program as a Military Intelligence Officer in the United States Army Reserve. She is currently the Assistant Military Intelligence Officer with the 7-158th GSAB located in Fort Hood, TX.

Lexy’s military awards and decorations include the Army Achievement Medal (2nd award), Army Good Conduct Medal, National Defense Service Medal, Global War on Terrorism Service Medal, Army Service Ribbon, Overseas Service Ribbon, Armed Forces Reserve Medal with “M” Device, Inherent Resolve Campaign Medal with Campaign Start, and Armed Forces Reserve Medal.

Lexy is from Barton, MD and attended West Virginia University in Morgantown, WV where she graduated Magna Cum Laude with a Bachelor of Arts degree in Criminology and Military Science. Lexy is a member of Phi Eta Sigma Honors Society and the Society for Collegiate Leadership and Achievement.

Paul Williams

Cyber Crimes & Forensics


Paul Williams has 44 years of breakthrough innovation in cybersecurity, cryptography, artificial intelligence, high-speed databases, software quality test engineering, software quality test engineering, electronics, communications, mechanical engineering, weapons development, and defense-related technologies.

Paul has extensive experience in conducting enterprise insider threat and economic espionage investigations, risk assessments, and remediation consulting for large commercial and government organizations. Paul is also an expert in rapidly solving complex network cyber intrusions through innovative techniques.

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Paul is a national and international public speaker with over 270 speaking engagements over the past 18 years for prestigious organizations such as ACP, ASIS, IIA, ESC, ISACA, ISSA, the United States Secret Service, U.S. Department of Justice, and FBI InfraGard.

As a result of Paul’s career-long efforts against computer malware, he has collected a wide assortment of hacking tools, viruses, worms, and Trojan Horses. To this day, Paul utilizes over 25,000 major computer viruses and 2,000 Trojan Horses for cybercrime investigative purposes.

Michael Sims

Personal Protection Officer

An accomplished and driven Security Specialist / Personal Protection Officer with 20 plus years of proven success in developing, implementing, and managing short, and long-term U.S. and International security operations within UHNW private/corporate sectors, politically sensitive environments, and culturally diverse climates.

Extensive real-world experience in protective services, physical security, officer training, and operational readiness.

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Professional Experience

  • Security Contractor | Global Executive Protection CONUS/OCONUS June 2004 – Current
  • PSD Team Lead | Operational Planning
  • Security Contractor | Faith Bible Church The Woodlands, TX February 2015 – Current
  • Security Advisor | Operational Planning
  • Security Contractor | Client Confidential-Nigeria September 2017 – Current
  • Corporate Security Advisor | Military Liaison
  • Security Contractor | UHNW Client CONUS/OCONUS March 2009 – September 2013
  • PSD Team Lead | Security Operations
  • Security Contractor | President Pervez Musharraf CONUS/OCONUS March 2010 – October 2012
  • PSD Team Lead | Security Operations
  • Security Contractor | HNW Client Confidential CONUS/OCONUS November 2011 – January 2013
  • PSD Team Lead | Security Operations
  • Security Contractor | Federal Probation Compliance Team CONUS February 2015 – March 2016
  • PSD Team Member

Licenses & Certifications

  • TxDPS Personal Protection Officer Texas Department of Public Safety-PSB
  • TxDPS Security Consultant Texas Department of Public Safety-PSB
  • TxDPS Commissioned Security Officer Texas Department of Public Safety-PSB
  • OGUK Medical Certificate Kelsey-Seybold Clinic
  • U.S. Passport | Yellow Card-Vaccinations Current

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