Texas License: A-11847 | Louisiana License: 7311-011910-LA

Alabama License: 395 | Tennessee License: 8510

  • Gillespie Forensics & Investigations works with a variety of corporate entities across Texas in helping them find the information they desire.
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  • DNA evidence can hold the key to unlocking many answers. If you have an item that you suspect may contain DNA it is possible to..
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  • Personal Protection, Safety Strategies, Safe Rooms, Fire Arms Training, Home Security, Concealed Carry Training as well as Instructor Training.
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  • Investigative background checks are necessary for a variety of reasons and can be tailored to meet the unique and specific needs of the client.
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  • Gillespie Forensics & Investigations can help you “locate” that hard to find person.We are highly trained investigators – not a database search company.
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For all your forensic, investigation, safety and security needs...

Gillespie Forensics & Investigations, located near Austin, Texas, is a full service private investigation, forensic and  safety/security consultation  company. We offer a wide-range of services for private individuals, attorneys, insurance companies, corporations, and investigation companies. We also specialize in a variety of training courses for PIs, security professionals, businesses and people. Contact us today for a free consultation and let us help you find the solutions you've been looking for.

Call us if you have a need for:

  • Cold case investigations/consultations
  • Criminal Defense Investigations
  • Review of autopsy reports
  • Crime scene reconstruction/consultation
  • 3-D Measurement, Imaging & Realization Technology for Crime Scenes/Accidents
  • Forensic analysis
  • Expert testimony
  • Forensic training
  • Investigative training
  • Security consultation, etc.
  • Training (Continuing Education; forensics and investigation classes, PI-interest courses, etc.)


Criminal Defense

Presumption of innocence is a legal right. No person shall be considered guilty until finally convicted by a court. In a criminal trial, the burden of proof is on the government. Defendants do not have to prove their innocence....Learn more

Forensic Support

Relying on 36 years of experience in forensic science, Mark Gillespie is skilled at evaluating evidence in all types of  investigations.  Mark Gillespie knows and understands the science and its vulnerabilities ....Learn More

Death/Cold Cases

GFI can evaluate unsolved death cases to determine if new analysis or forensic techniques could help develop new leads and/or bring closure to the case. Mark and his team can review autopsy results, police reports....Learn more

CrimeCon 2019

A Word from Our Clients

Contact Us

2501 South Bagdad RD., Suite B,
Leander, TX 78641

Best Private Investigators in Austin