PRECISION. DISCRETION.
RESULTS.

Cullen Investigations is a Tulsa-based private investigations and consulting agency serving clients across the state of Oklahoma and beyond. We provide a wide array of investigation services and support to individuals, law firms, and corporations.

Services

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22+ Years Of Experience

Why Choose Cullen Investigations?

Our licensed investigators, legal consultants and expert resources bring deep experience and professional tenacity to every case. From targeted surveillance and witness interviews to trial preparation and litigation support, we operate with clarity and purpose to deliver results that matter.

Our services

Legal Investigations & Support

Criminal Defense Investigation
Civil Investigation (divorce/paternity, tort claims, trust/probate)
Trial Prep (exhibit building, witness coordination, subpoena service)
Trial Support (jury consultation, counsel table, sworn testimony)

Corporate Investigations

Internal Theft, Fraud, Embezzlement, Contract Violations
Executive Background Checks
Due Diligence & Risk Assessments

Family & Domestic Investigations

Infidelity & Marital Misconduct
Child Endangerment, Custody and Safety
Stalking, Harassment, Protective Order Violations
Bug Sweeps, Digital Privacy Violations

Skip Trace & Person Location

Subpoena and Process Service
Missing Persons Searches
Heir and Estranged Family Location

What We Do

Surveillance & Field Investigations

Comprehensive Background Reports

Legal Investigations & Jury Trial Support

Location & Process Services

Witness Interviews & Statement Gathering

Civil & Criminal Case Strategy Consulting

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“The fact of private investigator Eric Cullen’s involvement, more than any innate self-corrective mechanism in the judicial system, was the critical factor in these cases. Had he not come along, and had he been less persistent, the men would likely still be incarcerated—and would have remained so until their deaths.”

– Washington Post

What Our Clients Say