Professional Private Investigator

Trial Prep.Org, LLC, based in Princeton, Indiana, is a professional private investigative firm providing trial preparation services for defendants, defense attorneys and corporations.

What is a Private In

Why You Should Choose Us:

Our Experience

At the helm of Trial Prep.Org is Marty Perkins, a seasoned law enforcement professional and board certified investigator offering more than 25 years’ of experience and specialized training (accreditation’s & certifications).

As a Private/Legal Defense Investigator,  he has been involved in cases involving alleged major criminal actions such as murder, attempted murder, rape, child molestation, theft, theft by deception, worker’s compensation fraud and numerous drug related charges.

Mr. Perkins is:

  • A Board-Certified Criminal Defense Investigator
  • Former Indiana State Police Detective

Recognized inside the courtroom as an expert in:

  • Sex Crimes Investigations
  • DUI/OWI Investigations

Mr. Perkins was also hired by the State of Indiana as an expert in the death of a law enforcement officer.


Our Approach & Flexibility

We will work with you, the attorney and/or defendant, as a team to assist in your legal defense.  We will meet with the client(s) to get the defendant’s version of the case.  Doing this detailed part of the investigation will free up you or your attorney to concentrate on the legal aspects of the case.

We ‘leave nothing to chance.’

We also assist in reviewing the case discovery and then assist in making an assessment of the case based on that discovery as to its strength.  As our name suggests; we are 100% dedicated to helping your team prepare for trial.

It’s an important fact that most litigation has issues that can be problematic within the courtroom.  As your Criminal Defense Investigator, we can pinpoint and then focus on the problems within each situation and assist in alternative remedies.

Our Range of Services

At Trial Prep.Org, we offer the following services:


  • Homicide Investigations
  • Death Investigations
  • Sexual Allegations Investigations
  • DUI/OWI Investigations
  • Impaired Driving Investigations
  • Accident Investigations
  • Civil Investigations
  • Domestic Investigations
  • Social Media Investigations
  • Cold Case Investigations

Process Service



  • Sexual Allegations Investigations Training
  • DUI/OWI Investigations Training
  • Lack of Investigation Training

As a small business, we offer the flexibility in our range of services to meet your needs.