Forensic Knowledge

Forensic Knowledge


More and more often criminal cases are being fought on the forensic front: DNA evidence, forensic pathology, cellphone technology, computer forensics and expert testimony of all kinds. It is imperative that today's criminal defense attorney be familiar with the forensics involved in criminal cases and adept at defending and presenting forensic evidence. Prosecutors frequently use "experts" hoping to sway the jury, but far too often, these experts are less than qualified, have used questionable methods or have reached faulty conclusions.


Forensic knowledge in criminal law proceedings is crucial. I have more than 25 years of experience as a criminal defense lawyer and a Ph.D. in criminology. In my career as an attorney, I have obtained extensive experience and knowledge regarding forensic evidence and procedures. When combined with my commitment to thorough research and dedicated case preparation, this knowledge is a tremendous benefit to my clients.


“Where many attorneys might read a forensic report and move forward under the presumption that everything is accurate, I break down this evidence thoroughly to bolster my clients' cases. I have the knowledge and experience in scientific method to break down this evidence, find errors and win for my clients.”

My knowledge of forensics benefits my clients in a variety of ways:

  • DNA evidence: This is perhaps the most critical piece of forensic evidence in the modern criminal trial. Everything from murder to petty theft often comes down to DNA evidence left at the scene of the crime.
  • Toxicology reports: In DUI and OVI cases especially, toxicology comes into play to determine the levels of intoxicants in suspects' systems, and toxicology comes into play in other criminal cases as well.
  • Gas chromatography-mass spectrometry (GC-MS): This forensic method is used commonly in drug cases as well as in OVI cases involving blood or urine tests. It is used to detect and identify substances as well as quantify the amount of drug or substance present.
  • Forensic pathology: Understanding the coroner's report and the medical conclusions is vital to successful defense of murder cases. I ask the "why" and "how" questions so that I can present an effective defense at trial. I will consult with the coroner who did the autopsy as well as obtain an independent review and/or get second opinions where called upon to do so.
  • Abusive head trauma and multiple fractures: Successful defense of these types of cases requires a solid understanding of the medical processes involved, including things such as brain hemorrhages, dural rebleeds, contrecoup effect, venous thrombosis, Ehlers-Danlos syndrome, rickets, classic metaphyseal lesions and more.
  • Fingerprints: I have worked closely with fingerprint experts in many cases. I am familiar with the importance of obtaining a second opinion when it comes to "subjective" forensic sciences such as fingerprints and handwriting analysis.

These are just a few of the important aspects of forensics I handle in my practice. My experience and knowledge provide benefit in understanding complex scientific evidence, cross-examination of expert witnesses and other important aspects of criminal defense.

"I challenge everything. Working with a private investigator and a team of forensic experts, I leave no stone unturned. If there is any error in the forensic evidence, I will find it."


I offer free initial consultations and have offices in Lancaster and Athens, Ohio.

  • America's Top 100 Criminal Defense Attorneys
  • National Academy of Criminal Defense Attorneys
  • The National Trial Lawyers: Top 100
  • Super Lawyers
  • NADC Top 1% of Lawyers
  • Lifetime Charter Member
  • 10 Best Attorneys Client Satisfaction
  • Top 10 Criminal Defense Attorney
  • Avvo 10.0 Rating Top Attorney
  • Avvo 5 Stars
  • Avvo Clients' Choice Award 2019
  • Expertise Best Criminal Defense Lawyers in Columbus
  • Sex Crimes

    At trial, Andrew elicited over 150 “I don’t know” responses from the alleged victim during cross-examination. The phrase “I don’t know” was the ringing mantra of Andrew’s closing argument.

  • College Rape

    College athlete accused of rape at a party. Through investigation and negotiation, I was able to prevent charges from being filed and got the athlete reinstated on the team.

  • Title IX Defense

    The University Title IX Board found the male student NOT to be in violation of the Sexual Assault Code of Student Conduct.

  • Murder

    Client was charged with murder due to the child’s fractured skull and massive brain hemorrhage. Through the reconstruction of events and the use of a defense expert, I could show that injuries resulted from a fall.

  • Violent Crimes

    Client was accused of forcing his way into a house. Ultimately, I was able to demonstrate that the alleged victim was lying in an effort to cover up her illegal activity.

  • Drug Crimes

    Client found in possession of a large amount of marijuana after his vehicle was stopped. Client was facing over 6 years in prison and the case was ultimately dismissed.

  • OVI

    Client was accused of being under the influence of narcotics. Drug Recognition Expert (DRE) was successfully challenged.

What Clients Are Saying

  • “Mr. Stevenson cared about our son as a person. He listened. He was available, responsive and kept us informed.”

  • “The most professional in communication, often going above to satisfy our schedules and location of residence.”

  • “Ability to successfully negotiate has eliminated many courtroom hours, while his ability as a trial lawyer wins cases.”

  • “Respectful, dedicated and trustworthy. Andrew was extremely helpful in resolving a legal issue of mine.”

  • “He kept me well informed of the progress with my case and quickly responded to any questions I had.”

The Strength You Need to Overcome Difficult Times
  • Unwavering Commitment

    While I realize that all attorneys claim they are committed, I strongly believe that I empathize with all of my clients. By limiting my practice in the number and types of cases I handle, I am able to more effectively address the needs of each individual.

  • Extensive Insight

    I have over 25 years' experience in criminal defense, a Ph.D., and extensive knowledge of forensics. Furthermore, I am a graduate of the National Criminal Defense College (NCDC), where I received advanced criminal defense and trial training.

  • Relentless Investigation
    Lawyers who rely solely on their "courtroom panache" will often fall short. I work in close collaboration with private investigators to make sure every shred of evidence is available to defend my clients.

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