What They’re Saying

  • "After 23 years of DUI work, I am pretty well versed in what to look for in a report, but when I got his work up, I was blown away. He spotted issues I had missed and cited all of his work. He did an extensive and well-detailed analysis of the videos and report and wrote up his findings in such a way that made it easy to use in negotiations. I was so impressed that I immediately hired him on many more cases, and his work has continued to blow me away. I now consider Mr. Marshall a must-hire on any DUI case."

    -Veteran DUI Attorney, Washington State

  • "When I shared the case evaluation with my attorney, it completely shifted the tone of my case. My lawyer actually sat down to write me a full email, for the first time, just to say how impressed he was with the memos. Mr. Marshall found a flaw in the blood collection process my attorney hadn’t noticed himself. We also used the mitigation memo in negotiations the same day. I can’t thank Zach enough."

    -DUI Defendant

  • “I brought Zach in on a felony DUI where the facts of the case weren't great. His breakdown of the SFSTs and body/dash camera footage totally dismantled the prosecution’s case. The jury returned a not guilty verdict and multiple jurors cited his report in deliberations. His work is surgical.”

    -DUI Trial Attorney, Washington State

  • “Zachary’s background as a DRE and former officer gives him a credibility most experts can’t touch. But what really sets him apart is how he translates complex investigations into clear, courtroom-ready insights. Judges listen. Prosecutors listen. And results follow.”

    -DUI Trial Attorney

  • "The consultant’s memos were exceptionally detailed and clearly the work of someone deeply trained in DUI defense. He identified an issue I had missed regarding evidentiary blood protocol, a trial-relevant flaw that could prove critical. His mitigation summary was persuasive and immediately useful in discussions with the prosecution."

    -DUI Defense Attorney, Michigan

  • “I’ve worked with a lot of experts over the years, but Zach is in a different category. His reports aren’t just detailed, they’re tactical. Every line is backed by authoritative sources and framed to actually move the needle. He’s become an essential part of my defense strategy.”

    -Managing Partner, West Coast DUI Firm