QRI is a private investigations firm that specializes in large, complex projects.

We collect evidence for litigators, handle internal investigations, unravel complex corporate structures, spearhead cases that support the public interest, and conduct due diligence.


About QRI

QRI is an investigations firm that collects evidence for civil litigators and criminal defense lawyers, conducts internal investigations, looks into allegations of misconduct, and unravels complex corporate structures.

We do research, interviews, and due diligence in anticipation of transactions and hires.

Although we have global reach, we are by design a boutique firm and therefore nimble. This allows us to provide personalized attention and creative approaches to finding information, wherever it lives.

We work with outside counsel, general counsel, executives at large companies, investors, government agencies, individuals, and not-for-profits.

At QRI, we strive not only to answer our clients’ questions, but to pose questions they may not have considered. Our findings are presented in concise reports written in plain English and sometimes buttressed with innovative graphics.

We specialize in:

  • Uncovering hidden information

  • Identifying, finding, and interviewing people

  • Tracking down obscure documents

  • Spotting patterns hidden in disparate groups of big data

  • Making connections where none seem apparent

  • Exposing conflicts of interest, breaches of duty, and undisclosed relationships

  • Conducting background checks

  • Finding elusive assets and enforcing judgments


Practice Areas

Litigation Support

QRI conducts sophisticated investigations for litigators who specialize in complex commercial matters, white-collar criminal defense, and international arbitration.

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Internal Investigations

When companies suspect wrongdoing from within their ranks, QRI works to root out fraud or discover whether otherwise improper behavior has occurred.

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Due Diligence

QRI supports companies and investors to vet deal partners, and we background management teams and asset managers. Our intelligence gathering goes beyond simple database searching.

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Investigations in the Public Interest

We use our investigative skill set to support causes that build a better society.

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External Threats

QRI helps organizations protect their brands from data breaches, counterfeits and grey market goods, and cyber attacks.

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Our People


Luke Brindle-Khym
Partner, General Counsel

Luke co-founded QRI and manages it with Tyler. He coordinates QRI’s largest investigations helping clients navigate high-stakes, cross-border disputes and deals. In 2018, Luke led the team that helped uncover evidence used to free rapper Meek Mill, who had been imprisoned for probation violations. Read more →

Tyler Maroney

Tyler co-founded QRI and helps manage the firm. He focuses on supporting commercial civil litigators, inside counsel, and white-collar criminal defense attorneys by gathering facts to resolve complex disputes. Read more →

Investigative Staff

Charles Linehan
Managing Director

David Burghauser
Senior Director

Anne Diebel

Anna Hendrick
Senior Investigator

David Usborne
Senior Investigator

Angel Shin

Featured [in Free Meek, a new documentary on Amazon Prime chronicling North Philadelphia rapper Meek Mill’s battles with the criminal justice system] are Luke Brindle-Khym and Tyler Maroney, who lead Quest Research & Investigations LLC (QRI), the firm that worked on HBO’s The Case Against Adnan Syed, in which they reinvestigated the murder case made famous on the podcast Serial. A release promises that new information about Mill’s case will be uncovered.
— The Philadelphia Inquirer


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Free Meek

2019: QRI's investigation is featured on the Amazon Prime documentary series Free Meek.

Watch Trailer →


Case of the Vanishing Journalist

2019: QRI's Tyler Maroney and David Usborne on media-minded private eyes.

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The Case Against Adnan Syed Documentary

2019: QRI's investigation is featured on the HBO documentary The Case Against Adnan Syed.

Watch Trailer →


Dashiell Hammett’s Strange Career

2018: QRI's Anne Diebel examines Dashiell Hammett's strange career.

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Paper Terrorism: Anti-government vigilantes wield a subtle weapon

2018: QRI's Tyler Maroney and Anne Diebel published an article in Harper's Magazine about Paper Terrorism.

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Dreams & Nightmares: The Meek Mill Story

2018: QRI Partner Luke Brindle-Khym and QRI were featured on Dateline's "Dreams and Nightmares: The Meek Mill Story."

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2018: QRI investigation featured in Rolling Stone.

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Your Mother’s Maiden Name Is Not a Secret

2017: QRI's Anne Diebel published an Op-Ed in the New York Times.

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The Boring Life of a Private Investigator

2015: QRI Partner Tyler Maroney published an Op-Ed in The New York Times.

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Spy for a Day

2016: QRI Partner Tyler Maroney profiled a former British intelligence operative in the WSJ.

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In Harm's Way

2015: QRI Partner Luke Brindle-Khym was featured on CNBC's American Greed.

Watch Show →


Contact QRI

41 East 11th Street, 10th Floor
New York, NY 10003

Phone: 212-699-3735
Fax: 888-974-1503