Oklahoma's Most Trusted Private Investigations Firm

Cullen Investigations is a full-service private detective agency based in Tulsa.  We provide comprehensive investigative and consulting services for individuals, attorneys, and corporations across the state.

OUr Services

and Consulting Services

Our team has the experience, resources, and tenacity to uncover the truth and deliver results. We offer targeted surveillance, background checks, skip traces (people finding), litigation support, and legal investigations for domestic matters, corporate and civil actions, criminal defense, and more.

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Areas of Expertise

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Child Endangerment

Missing Persons

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Background Checks

Due Diligence

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Criminal Defense

Family & Domestic

Wrongful Convictions

Tort Claims

Probate/Trust Disputes

Process Service

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Nationally recognized as one of the most effective agencies in the country

Over the past 18 years, we’ve earned a reputation for accuracy, reliability, and efficiency while working hard to cultivate relationships with attorneys and expert resources.

Concerned parents hire us to find their missing kids. Suspicious spouses hire us to figure out what’s really going on. Defense attorneys hire us to interview witnesses, coordinate forensic analyses, conduct undercover surveillance, and provide general investigation support throughout the trial process.

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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

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