Experience You Can Trust

NBI was founded on the belief that every client—whether an individual facing a personal challenge or an attorney preparing for court—deserves thorough, honest, and professional investigative support.

With years of hands-on experience in criminal defense investigations, surveillance, background research, and case analysis, we bring clarity to complex situations and deliver results you can rely on.

Meet the Investigator

Bob Ruff — Licensed Private Investigator in Michigan and Indiana

With a bachelor’s degree in criminology from Purdue University Global and a background in criminal justice, defense investigations, and advanced fieldwork, I have dedicated my career to uncovering the truth with precision and integrity.

My approach blends professionalism, discretion, and a genuine commitment to helping clients navigate difficult and often stressful circumstances.

Professional Background & Credentials

Areas of Expertise

  • Criminal defense investigations.
  • Post-conviction case reviews.
  • Witness location & interviewing.
  • Surveillance (covert & mobile).
  • Background & digital research.
  • Fraud and misconduct investigations.
  • Evidence analysis & report preparation.
  • Missing Persons Investigations.

Professional Highlights.

  • Worked directly with Innocence and Exonerations Projects across the country.
  • Worked alongside multiple criminal defense attorneys across Michigan.
  • Contributed investigative support for pre-trial and post-conviction cases.
  • Demonstrated track record of uncovering key evidence in complex cases.
  • Recognized for clear, organized, and courtroom-ready documentation.

Education, Licensing & Certifications

  • Bachelor’s Degree in Criminology — Purdue University Global

  • Michigan Professional Investigator Agency License — #370330379
    (View Michigan License)
  • Indiana Private Investigator Firm License — #PI22600018
    (View Indiana License)
  • Training in interview & interrogation techniques.

  • Continuing education in surveillance methods.

  • Certification in legal & ethical investigative practice.

Our Mission

  • At NBI, our mission is simple:
    to uncover the truth with integrity, accuracy, and discretion.
  • We provide investigative services that empower clients with clarity, confidence, and actionable information—no guesswork, no uncertainty.

Why Clients Choose NBI

Transparent Communication

Ethical, legal investigative practices

Clear, thorough reporting

Personalized approach for every case

Trusted by attorneys and individuals alike

Licensed & Experienced Investigator

Ruff's Work Highlighted in Media

Serving Michigan, Indiana & the Michiana Region

Based in Niles, Michigan, NBI is licensed to serve clients in both Michigan and Indiana, with convenient coverage throughout Southwest Michigan, Northern Indiana, and the broader Michiana region.

Consultations are available by appointment, and every matter is handled with professionalism, discretion, and respect for client confidentiality.

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FREE CONSULTATION

Consultation

Licensed Private Investigator — Michigan & Indiana.

Over 10 Years

Experience Conducting Investigations