Texas Institute of Investigations

Dottie Laster and Gillespie Investigations present this working lab for investigators.

Texas Institute of Investigation

This partnership program aims to educate private investigators using a lab experience with real cases.

The goals of the Institute are as follows:

  1. To provide affordable and effective, cutting edge training for investigators, inspectors, and detectives.
  2. To improve access to training and real world experience which will increase the value of investigators to the community, law enforcement, families, and individuals.
  3. To give participants a cutting edge experience and training for making our communities safe and free from abduction and exploitation.
  4. To increase the number of clients who hire private investigators and investigators who may help victims of crime.

Classes Offered Include:

  • So You Want to be a PI?
  • Finding Your Niche
  • Human Trafficking and Missing Persons
  • How to Work with Government Agencies
  • How to Write a Report
  • Digital DNA: Social Media Investigations
  • Interview Techniques
  • Expert Testimony
  • Surveillance Techniques
  • Forensic Techniques and Evidence Collection

Courses offered will provide continuing education (CE) credits to students who become licensed or registered in Texas. Click to read more about classes and register


Dottie Laster
Dottie Laster

Dottie Laster

Executive Director of the Heidi Search Center

Dottie Laster is the Executive Director of the Heidi Search Center and a licensed private investigator in Texas. Laster is featured in the documentary on sex trafficking in Latin bars and cantinas, The Cantinera, and her direct rescue work is the subject of the MSNBC Documentary, Sex Slaves: Texas Rescue. She is the recipient of several human rights awards and has been featured in numerous publications including recent issues of Texas Monthly, Town Hall, and MORE Magazine’s Sex Trafficking’s Unlikely Angel and recipient of the Guardian Angel Award. Recently she was featured in an Episode of Vanity Fair Confidential on Investigation Discovery.


Mark Gillespie
Mark Gillespie

Mark Gillespie


Mark Gillespie, owner and founder of Gillespie Security and Investigations, is a long time friend of Dottie’s and has collaborated with her to create Texas Institute of Investigation that will provide state of the art investigation training for persons interested in becoming licensed or registered private investigators in Texas. To learn more about Mark Gillespie, go to his website at www.gillespieinvestigations.com.

%d bloggers like this: