Chief Investigator

Brent Quinn

Contact
brent@guilmettehenderson.com
833-377-3060
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Brent G. Quinn brings nearly three decades of elite federal investigative experience to every case. With 29 years as a federal law enforcement executive and 18 years in senior leadership, Brent knows how to cut through complexity to deliver results in high-stakes, sensitive investigations.

As Supervisory Special Agent for the Bureau of Alcohol, Tobacco, and Firearms, Brent led a team of dozens of criminal investigators, intelligence analysts, and task force officers across 21 counties in Georgia. He directed complex, multi-jurisdictional investigations involving violent crime, firearms trafficking, and organized criminal enterprises, building strategic partnerships with federal, state, and local agencies that turned operational objectives into actionable outcomes.

Brent's investigative leadership has produced landmark results, with record-setting cases in multiple jurisdictions. In DeKalb County alone, his coordinated federal, state, and local initiative targeting violent crime resulted in over 300 felony arrests, 200 firearms seized, and the recovery of substantial narcotics and cash. His work has earned multiple national awards for his exceptional leadership in complex street gang and drug trafficking investigations.

Beyond fieldwork, Brent served as Program Manager for ATF's Professional Responsibility and Security Operations, where he planned and conducted internal compliance reviews and audits nationwide. He briefed senior leadership on operational strengths and compliance gaps and served as the primary liaison to oversight bodies including the Government Accountability Office and the Office of Inspector General during audits of agency programs.

Brent earned his Bachelor of Science in Criminal Justice, magna cum laude, with a minor in English from the University of Nebraska-Lincoln. He is an active member of the Georgia Sheriff's Association, Georgia Narcotics Officers Association, Georgia Gang Investigators Association, Fraternal Order of Police, and DeKalb County Chiefs of Police.

With deep experience in complex investigations, litigation support, witness interviews, evidence collection, inter-agency coordination, and trial testimony, Brent delivers thethoroughness, discretion, and strategic insight that complex cases demand.

 

Education

Bachelor of Science in Criminal Justice, Univeresity of Nebraska-Lincoln

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