Every client has a story the court has not heard yet.
For more than 30 years, Colleen Quinn Investigations has given criminal defense attorneys the investigation, mitigation and sentencing advocacy that move outcomes in state and federal court.
One firm for the work behind the defense.
We work at the direction of defense counsel, from the first interview through sentencing, so the attorney can stay focused on the case.
Mitigation
A full life history investigation that places the client in context and gives the court a reason to choose a less punitive sentence. Capital and non-capital, adult and juvenile.
Learn more New serviceSentencing Portfolio for Professionals & Athletes
For white collar defendants, executives and public figures. A forward-looking sentencing package built on community, career, restitution and program enrollment.
Learn more 02Defense Investigation
Witness location and interviews, discovery and evidence review, phone and location records, and a theory of defense report that tells counsel where the case is strong.
Learn more 03Records & Litigation Support
Records retrieval and chronological summaries, witness management, expert sourcing and trial preparation, organized so counsel can find anything in seconds.
Learn more 04Sentencing & Mitigation Videos
Biographical documentaries for judges, juries and the Department of Justice, plus Day in the Life videos for civil matters.
Learn more 05Background Investigations
Due diligence on individuals and businesses that goes past the database report to the documents and the people behind them.
Learn moreBuilt to work inside the defense team.
Attorneys keep coming back for the same reasons: the work is thorough, it arrives on time, and it is ready to use in court without being rebuilt.
Engaged through counsel
We work as an agent of the defense attorney, so our work product stays within the defense team. We are available on private retention and on appointed state and federal cases.
Everything in one usable record
Interviews, records and history come back as a single organized report with every source cited, ready for a sentencing memorandum, a mitigation hearing or a penalty phase.
Proven on the hardest cases
Our team has worked capital cases in state and federal court, including federal prosecutions in which the government withdrew the death penalty.
Outcomes our work has contributed to.
State of Florida
All charges dropped
A client facing the death penalty for a triple homicide was released after the defense investigation uncovered phone and location evidence, new witnesses and video. The State entered a nolle prosequi.
United States District Court
Death penalty withdrawn
Across several federal capital prosecutions, including racketeering and murder for hire cases, death was removed as an option after mitigation was presented to the Department of Justice.
State and federal
Reduced sentences
In non-capital cases, our mitigation reports and sentencing videos give the court the full picture of the person being sentenced, not only the offense.
Sentencing advocacy for professionals and public figures.
Not every client’s story is one of hardship. For executives, licensed professionals and athletes, the strongest sentencing case is often a record of contribution: community work, careers, families who depend on them, restitution already underway and programs already started. We document that record and build it into a sentencing portfolio for counsel.
What attorneys say.
“Her ability to connect with the client, families, and witnesses is superb, and the attention to details in her work product is priceless.”

“Colleen’s ability to gather information and evidence relevant to my case and encapsulate that information into a detailed, comprehensive, and presentable mitigation report is second to none.”

“I have used Colleen Quinn-Adams exclusively for over ten years in that capacity and could not be more pleased. She is extremely thorough and prompt.”

“Colleen knows how to get information, what information is needed and she knows how to present that information to the attorney as well as the jury.”

“Her greatest strength is synthesizing the massive amount of information she collects into an exceptionally usable and presentable form.”

“Colleen Quinn Investigations has been a lifesaver for me time and time again over the past 25 years.”

The sooner we start, the more we find.
Attorneys receive one complimentary hour of consultation on any case. Tell us what you are facing and we will tell you how we can help.
