About DIESEL INVESTIGATIONS
​Diesel Investigations delivers fact-driven investigative support for attorneys, businesses, and individuals who need answers they can rely on.
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We focus on three core areas: case development, witness interviews, and due diligence investigations. Founded by former FBI Supervisory Special Agent Matthew Bertron, with 27 years of federal investigative experience, we bring disciplined, results-oriented methods to every case.
We don’t deal in assumptions.
We uncover truth, facts, and answers.
Our Focus
We conduct investigations that directly support legal strategy, decision-making, and risk assessment.
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Litigation Support & Case Development
We organize complex facts, build timelines, and identify critical gaps that impact case direction and trial readiness.
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Witness Location & Interviews
We locate and interview key witnesses using structured, professional techniques designed to uncover accurate, defensible information.
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Background & Due Diligence Investigations
We assess credibility, verify information, and identify risk in legal, business, and personal matters.
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Additional Investigative Services
In addition to our core practice areas, Diesel Investigations provides support in related matters when aligned with client needs:
Discreet surveillance operations
Executive protection support
Sensitive personal and domestic investigations
Asset and activity verification​
His (Matt’s) investigative skills are exceptional, his judgement is sound and his commitment to truth and justice are absolute.
Hugo J. FBI colleague
Leadership
Matthew Bertron, Founder
Diesel Investigations was founded on a simple idea:
When the stakes are high, clients need clear, reliable facts—not guesswork. After nearly three decades in federal law enforcement, Matt built the firm to bring a disciplined, methodical approach to private investigations—one grounded in experience, discretion, and accountability. Today, that experience is applied with a singular focus: delivering work that is thorough, defensible, and built to stand up under scrutiny. The goal for every case: get the facts right, follow them wherever they lead, and deliver answers clients can act on with confidence.​
LETS TALK!​
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Confidential 15-Minute Consultation - No Obligation
Let's discuss your case and determine the best path forward - quickly and discreetly.​
Give me a call at 888-296-0660 or Click Below​​​
As my supervisor, I witnessed firsthand his extraordinary professionalism, fairness and
commitment to both mission and people.
Kim M, FBI direct report
Matt's experience includes violent crime, fugitive investigations, international kidnappings, art crime, and federal violations of interstate commerce. He is a former member of the FBI’s National Art Crime Team and Underwater Evidence Recovery Team, where precision, discipline, and methodical execution were critical to mission success.
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Prior to his FBI career, Matt worked as a professional journalist and editor, developing a strong foundation in interviewing, fact gathering, and clear, accurate reporting—skills that continue to shape his investigative approach today.
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Credentials & Professional Background
Criminal Defense Investigation Training Council (CDITC), Criminal Defense Specialist
Certified Forensic Interviewer (CFI), International Association of Interviewers
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ASIS Triple Crown: CPP®, PCI®, PSP®
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​New York State Licensed Private Investigator
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​Executive Master’s in Leadership, Georgetown University
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MBA/MA, New York University​
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Member, Association of Threat Assessment Professionals (ATAP)
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Specialized training in Executive and Dignitary Protection​
How We Work
Diesel Investigations operates with a focused, hands-on approach. Every investigation is conducted directly—without unnecessary layers or outsourcing—and documented clearly so clients can rely on the results with confidence.
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Our work is grounded in objectivity, discretion, and a commitment to delivering facts that are accurate, defensible, and actionable.